Fusion Dance



""Fuuu... sion!! Ha!!""

- Dragonball Z

Two separate characters merge to make one, usually more powerful, unified being, either willingly or via Applied Phlebotinum and/or Merging Machine. This can have a number of results:


 * The Composite--A and B merge; the end result C has aspects of both the characters that were part of the merge, including a fused personality. For example, fused fighters in Dragon Ball Z.
 * Power Booster--Person B disappears, but the merging gives A powers or attributes he or she didn't have before. B may be able to speak to A in his or her mind. A still looks exactly the same as before, only has superficial changes (clothing, for example), or looks like a more powered-up version of A (and only of A). For example, Himeno and a Leafe Knight in Prétear.
 * Switcher--A and B merge; they both keep their traits but only one of them can be present at a time and they can now switch places as needed. If B is the powerful one but A lives the everyday life then B will act as a Super-Powered Alter Ego. May result in A or B occasionally controlling the other's body. For example, Birdy the Mighty or Yuugi Mutou and Yami Yuugi from Yu-Gi-Oh!.
 * Biological Mashup--A and B merge physically, but both personalities retain some control over the body. If full control is not possible on either side they will need to cooperate only to move. Even if that problem does not exist the personalities might end up fighting for control if they do not agree on something. See also Evil Hand.
 * Mixed Form Shapeshifter--A and B merge and instead of choosing between two forms, they can combine them as they need, and can make a form with the advantages of both forms. For example, Fusion Evolve from Digimon Frontier.

In most cases this is to make a being more powerful than either would be alone (especially when it involves The Hero and The Rival since that invokes Yin-Yang Bomb), but there are some exceptions.

The Gender Bender-ness of male-female fusions seems to go ignored more often than not.

Compare Combining Mecha. Not to be confused with Composite Character. See also Motif Merger and Equippable Ally (for a less intrusive method of combining two characters).

Anime and Manga

 * In Cells at Work! a bunch of Staphylococcus Aureus (anthropomorphized of course) form a grape-like structure that is their namesake. Then this grape structure fuses into a giant anthropomorphized Staphylococcus Aureus.
 * Dragon Ball Z provides the Trope Namer and many examples of character fusions. In several cases, fused characters even speak with both voices of their individual parts in unison. The series has several kinds of fusions:
 * The Trope Naming move itself is a Composite type (which requires two warriors of similar strength and size to perform), and it's also temporary. Three examples were shown: Goten and Trunks becoming Gotenks, Goku and Vegeta becoming Gogeta in the movie "Fusion Reborn", and Goku and Vegeta becoming Gogeta as Super Saiyan 4 in Dragon Ball GT.
 * The fusions created from Potara Earrings are, unlike the Fusion Dance, permanent and do not require fusees of similar strength and size. Because of that, while they can produce Composite fusions (like Vegetto), one of the component characters can have a dominant presence in the fused character instead—making the fusion more of a Power Booster. (For example, —their halves are so dominant that they're practically the  with the addition of memories, powers, and (a few) physical traits from their other halves).
 * The Namekians have their own form of fusion which is mostly a Power Booster; one Namekian will fuse his body with another, boosting the other Namekian's power level and giving them access to their memories and abilities, but doing relatively little to alter their personality or appearance.
 * Cell absorbs Androids 17 and 18. They act as a Power Booster as they change Cell's appearance but not to mimic their own.
 * Buu uses a Biological Mashup style absorption, absorbing a victim, gaining some of their physical traits, and having a personality change to lean towards the absorbee, also gaining knowledge and power. However, for Buu this works both ways: Whilst absorbing Ultimate Gohan gave him a huge boost in power, absorbing a fat elder Kai not only added a fun-loving, playful shade to his personality, but also weakened him considerably.
 * Launch may not be the result of a fusion, but she definitely has the characteristics of a Switcher. Going from gentle hearted wide eyed, blue eyed, blue haired woman to angry, violent, gun toting blonde woman with green eyes with just a sneeze.
 * While not canon, Goku and Hercule can fuse with Potara earrings to become Gokule and Tien and Yamcha can perform the Fusion Dance to become Tiencha in some games starting with the second Budokai game.
 * In one What If nightmare, Cell absorbs Krillin instead of 18. Picture an orange Cell Jr. with Krillin's face.
 * As noted above Yu-Gi-Oh! features a Switcher, but with a twist (Yami Yugi is dead and doesn't have his own body to return to, instead being stored in the Millennium Puzzle). A number of other characters can do this; most Millennium Items also seem to have the ability to split/merge souls in one body, though without physical power-up (unless you count increased card game prowess).
 * It does.
 * There's also a Power Booster example: In the spinoff commissioned by 4kids, Capsule Monsters, Yami can can fuse with certain monsters such as the Dark Magician. Joey also fuses with the Red-Eyes Black Dragon at one point.
 * Yu-Gi-Oh! also subverts this (in that Malik's eye stays with him) when he merges with his Egyptian god card.
 * The Elemental/Evil Hero Fusions used in Yu-Gi-Oh! GX work as the first two types, combining into a hodgepodge Hero of its components with beefed up versions of their abilities. The Neos fusions fit into this trope better, though, as for the most part, they rely on the materials' innate "Contact Fusion" power to form, instead of an outside Fusion spell like the others.
 * Juudai and Yubel's fusion are of the Power Booster variety; Yubel can still speak to Juudai in his mind (and appear as a spirit), and he can use her powers and when he does so, his eyes change colors to be just like hers.
 * In the card game itself, there is a card called Fusion (Polymerization in the English version) that lets you fuse two or more monsters into one big one. Sometimes they share attributes of both (Black Skull Dragon), other times it's a literal cramming together of multiple monsters into one body (Blue Eyes Ultimate Dragon) and sometimes it's something so totally random one can only wonder why they made it a fusion monster (Metal Dragon). Fusing a mounted warrior with a monster usually just resulted in the warrior switching mounts (Gaia the Dragon Champion).
 * Yuma and Astral in Yu-Gi-Oh Ze Xal have learned to fuse. It's a power booster: Astral disappears and Yuma's hair turns gold (seen here), but unlike Juudai and Yubel, they can also de-fuse.
 * The Digimon verse has examples of both the first and second types:
 * Digimon Adventure has War Greymon and Metal Garurumon fuse into Omegamon (aka Omnimon) in The Movie. Omegamon not only looks like both of them, but speaks with the voices of both at once. Composite.
 * Digimon Adventure 02 gives the entire team the ability to form similar merges, under the name "Jogress Evolution" in the original and "DNA Digivolution" in the dub.
 * Note: Jogress Evolution is unique in that there's a certain instance of dominance - the anime only ever shows one outcome of these jogress evolutions, but in the cards, there is suggestion of multiple outcomes. For example, the anime introduces Paildramon, a Dragon Man Digimon, who is largely Ex Veemon wearing Stingmon's armor (bar a few modifications), who evolves into Imperialdramon, at which point all bug-type characteristics have disappeared. By comparison, another result of Jogress with the same ingredients in another order yields Dino Beemon, an insect digimon with some Ex Veemon traits, who in turn evolves into Gran Kuwagamon, a complete insect. Another example is Gatomon's fusion evolution - she usually contributes to the form of Silphymon with Aquilamon, but multiple cards of her evolved form, Angewomon, can be used by DNA-digivolving Gatomon and Aquilamon as well (even earlier versions of the card would accept Birdramon in Aquilamon's place).
 * In Digimon Tamers, Biomerge Digivolutions are when a human and their Digimon partner evolves into a more powerful Digimon which looks at least to some extent like the Digimon. This is a type two with the "more powerful version of A" coming into play, the humans float around naked in some sort of other dimension—perhaps representing their spirits.
 * A curious aspect is that the incantation for Biomerging is the same as the one for digivolving to Ultimate, "Matrix Evolution," in the original Japanese version.
 * Digimon Frontier: Susanoomon is the result of what would have been called DNA Digivolution if this was 02: Emperor Greymon and Magna Garurumon become one, speaking with the voices of both in unison. However, the form doesn't change when the other members of the Five-Man Band join in. Sometimes you get Tamers-style naked spirit scenes, but when Susanoomon is seen from the outside, the standard Grey/Garuru combined voice is still used.
 * Digimon Frontier might have a 'Switcher' where the Digidestined use the spirits of digimon to fuse. It's not just a Transformation Trinket, but the spirit combining with any human and digimon, and they transform into a new digimon, and they personalities combined. In the series finale, the Digidestined are talking with their very own spirits.
 * This season also has a unique type of Fusion, where characters combined the transformations granted by their Human and Beast spirits to create a new form combining traits of both (e.g. a character who could transform into a dragon or an armoured warrior could become a humanoid dragon wearing armor). Only Takuya and Koji ever do it. At least in the anime.
 * Digimon Xros Wars draws from multiple categories. The human characters with "Xros Loader" devices can temporarily fuse together Digimon into new forms: some are in the "composite" category, while others become inanimate weapons to be wielded by the remaining characters. Some opponents are shown to absorb their subordinates, falling under "biological mash-up" (minus the blending personalities).
 * Symmetrical Docking in GaoGaiGar creates the composite example.
 * Fullmetal Alchemist also provides a number of examples:
 * There's Chimeras, understood in-universe to be an Alchemical Composite fusion of two beings. Human Chimeras tend to be a Mixed Form Shapeshifter—if done correctly. Failed Human Chimeras result in a Composite-like fusion with the human half's soul and memories in control, but very much in pain. Successful ones retain their human forms, but can transform into a Half-Human Hybrid or gain powers reminiscent of the animal fused into them.
 * The Power Booster and Switcher varieties also comes courtesy of the Homunculi. It appears to be a common hubris for them: they think of things they've eaten as food, but their "food" often retains an independent will.
 * are somewhere between Power Booster and Switcher.
 * After was almost defeated, he ate  and gained powers, but remained in control. He later ate , but this backfired because  managed to remain a distinct personality—because.
 * Late in the series, tried to absorb  to get his powers and knowledge, and then tried to absorb  to get his philosopher's stone. Both backfired in quick succession:.
 * Naruto has Beast Man Kiba, who can merge with his dog Akamaru into a massive two-headed wolf of doom. The body counts as a third form over which both participants have control, but the two of them are typically so in sync that there is no squabbling about a course of action. They just kick ass.
 * have shown the ability to merge into a bizarre Ent-like giant.
 * There's also, who integrated 's body into his own to gain vastly increased power and special abilities.
 * The Guardians also pull it off in the Mega Man Zero manga, becoming that series' "Copy X". Interestingly enough, they beat the heck out of Rockman Zero, but they lose to the cowardly Zero. That's embarrassing.
 * The Power Booster variant turns out to have taken place in Darker than Black with . She somehow lives on inside him.
 * Unison Devices in Magical Girl Lyrical Nanoha are, ostensibly, Power Boosters. A form of Living Weapon designed by the ancient Belkans, they take the "living" aspect to a greater extent than Mid-Childa's Intelligent Devices. These "sentient magical programs" (powerful offensive mages in their own right) can unison with a mage (or knight, as Belkans called them) to boost their abilities. Usually this comes with some form of change in the color of one's hair, eyes, or even clothes and armor ...
 * ... However, Unison Devices can also act as a Switcher. As weapons with egos, they can overwhelm their users, practically absorbing them; this is known as a "Unison Accident," where the subsumed user's body transforms into the Unison Device's own, and the Unison Device is the dominant personality.
 * Shugo Chara's Character Transformation system works as a Power Booster. Amu wears the clothes of the respective Chara inside her, and gains a bit of extra power and agility with it.
 * The lesser version of this, the Chara Change, results in a change in hairpin and a violent personality shift as Amu's Chara basically possesses her, often without thinking to seek her consent, good intentions or not.
 * Figure 17 features a sentient alloy that "fuses" with other people (the result is a somewhat androgynous alien being with superpowers). The main character, Tsubasa, ends up with one "leaking" from its protective container all over her and fuses with it; afterwards, the alloy takes its own form as Tsubasa's "twin" Hikaru, since it has no container to return to.
 * Scrapped Princess uses a mix of the Power Booster and Composite variety. When Shannon (a regular knight) and Zefiris (a dragoon) fuse together, her human-like body disappears, but Shannon is covered by her dragoon form, which in its incomplete form just looks like some sort of fearsome aura, making it look like his powers are just boosted.
 * Chizuru and Kouta can do a Power Booster-style fusion in Kanokon. This kind of uniting can only be done if the kitsune and the partner are willing—and Kouta is. The most noticeable differences to Kouta are ears, whiskers, a tail and the ability to launch fireballs.
 * Out of the blue the finale of Jubei-chan has inexplicably joining together and then proceeding to kick ass.
 * In UFO Princess Valkyrie 2, Akidra is born of a Composite fusion ... with a twist.
 * In Berserk, Schierke has merged with Guts several times, but not to power him up- she did it to prevent him from killing the rest of the party due to the effects of the cursed Armor he wears.
 * About the Gender Bender-ness above mentioned, in Maze Megaburst Space Maze is a switcher-class fusion of Otoko-Maze and Onna-Maze
 * Also has elements of a Composite type since when temporarily separated it become clear that its not a one-to-one correspondence and Onna-Maze has picked up some of and Otoko-Maze has picked up some of.
 * The abovementioned "Power Booster"-type transformations in Prétear allow Himeno to choose between seven available forms and powers by choosing a Knight to merge with, but result either in her draining the Knight's "Leafe" in order to perform attacks (manga), or in the Knight receiving injuries from battles instead of her (anime). Additionally, in the anime version the transformations are specifically said to be the result of joining spirits, not bodies—which seems to make it impossible for the Pretear to merge with a Knight against her will, even if she is just in doubt.
 * In D.Gray-man, twin brothers Jasdero and Devit shoot each other in the head to merge into one single entity... Jasdevi. However, it has been hinted that Jasdevi might have split into the twins ... but the twins are always seen as separate entities in both the manga and anime.
 * Bobobo-Bo Bo-bobo parodies DBZ's Fusion Dance with several of its own bizarre fusions, including BoboPatch (Bobobo + Don Patchi), BoboPatchnosuke (Bobobo + Don Patchi + Tokoro Tennosuke), and Denbo-chan (Bobobo + Dengaku Man).
 * Don't forget PatchBobo, (Don Patch + Bo-Bobo) when Don Patch switched his name to top billing. (This would arguably be a type D fusion. The fusions have nothing to do with whomever fused to become them.)
 * Also mentioned in the examples, Birdy the Mighty. Interstellar Police Officer Birdy accidentally injures Tsutomu in pursuit of suspects who fled to Earth. As punishment for being so reckless (or trying to cover it up in the manga) she is forced to allow Tsutomu's consciousness to share her body while his is fixed. She can shapeshift into Tsutomu's form so he can continue his everyday life but—at least in the TV series—she appears to maintain ultimate control over their shared body.
 * Early on in Shaman King, the shamans tended to use their own bodies as vessels for their spirit partners. Later, they learned to use inanimate objects instead for greater effectiveness.
 * In Bleach,
 * Part of Ichigo's technique involves.
 * Parodied in Keroro Gunsou—Momoka's split personality is manifest as a second Momoka, and the only way to rectify this is through a literal Fusion Dance, where mastering synchronized swimming will cause them to synchronize physically and meld back into one. Unfortunately, Keroro and Giroro, by way of imparting this to Momoka, get themselves fused together by complete accident.
 * More recently, Keroro fused with each member of the platoon one by one in an attempt to boost their powers to invade earth, but turns out to be helpful instead of harmful.
 * Cross Fusion in Mega Man NT Warrior essentially results in Lan in a Mega Man suit. Mega can communicate with Lan (and they have to be in sync with each other or the fusion falls apart), but otherwise Lan is the one in control. (The same goes for most other Cross Fusion cases, unless the human has a very different body type than the Net Navi. The human's body type wins.) Power Booster disguised as Composite.
 * One Piece villain and Big Eater King Wapol has the ability to eat anything (or anyone) and fuse them with himself or together, such as the Composite Chessmarimo.
 * Shinzo The majority of characters in the show are Enterrans. Enterrans have the ability to transform to become stronger and they turn into "En Cards" when they die. When an Enterran eats an En Card, or absorbs one through the chest, they transform into a composite of them self and the Enterran the card they ate/absorbed came from. The protagonist does this with the other male heroes to become Mushrambo.
 * The ending of Rebuild of Evangelion 2.0: Unit 01.
 * Episode 21 of the Soul Eater anime: Blair is fighting the (remaining) 5 Mizune sisters. She smashes four of the sisters with one spell...but the fifth sister behind her starts giggling madly. Activating the hivemind within the sisters (accompanied by speaking in sync and rhythmic finger-snapping), Create a Totem Pole Trench the five combine to form... a Hot Witch. It Makes Sense in Context... I guess.
 * Though the 5-Mizune witch has yet to do anything but provide Fan Service, in the manga two or three Mizune can combine together to form a teenage-looking girl (the one made from three looks a bit older) actually capable of fighting.
 * In Nurarihyon no Mago, Rihan's and Rikuo's ability as a half-youkai, Matoi,.
 * In Cinderella Boy, Ranma (no.) and Rella are rebuilt into the same body after a fatal accident by a Mad Scientist. Every 24 hours, they switch places. The scientist developed the system as a way to reduce overpopulation: Multiple people in the same body take up less space, after all.
 * In Claymore, Raphaela has vowed to kill her sister. However, since she loves her, she ends up unintentinally pouring her life energy into her in the same instant. The end result looks somewhat like Conjoined Twins and is initially completely unresponsive like a statue - untill someone wakes it up, giving birth to the Destroyer.
 * Black★Rock Shooter has the Power Booster variant - the titular character gains access to her arm cannon when she merges with . Her appearance is unchanged, though.
 * Pluster world is a Mon anime where the mons transform by fusing with humans.
 * Beelzebub can fuse through
 * Puella Magi Madoka Magica has a villainous example:
 * Beelzebub can fuse through
 * Puella Magi Madoka Magica has a villainous example:

Comic Books

 * For the record, the picture above is "the Amazing Copyright Infringement Man", a parody created for Mad Magazine by Jim Lee.
 * The entire Amalgam Universe consisted entirely of Composites of a DC character and a Marvel character. Popular characters from the series of one-shots include Super Soldier (Superman + Captain America (comics)), Darkclaw (Batman + Wolverine), and Lobo The Duck (Lobo + Howard the Duck)
 * Jean Grey/Phoenix of the X-Men alternates between being a case of Switcher and Touched by Vorlons, depending on the story.
 * Generation X features the St. Croix siblings: Gen-X member Monet proves to be a fusion of her little sisters, twins Claudette and Nicole, who had merged to replace the original Monet when she went missing (the twins being 8 years old, their apparent age was doubled to 16 and convincingly passed as Monet in their merged form). Later on, they fuse with their older brother, Marius/Emplate, to become the androgynous M-Plate. The St. Croixs' fusion can be called Composites, but there's more to it than that. The fused forms are more than the sum of their parts, entirely different from the siblings they came from, and with powers that don't always involve those of the source individuals (but then again, the twins' powers have never been fully explored). This means M-Plate was composed of 3 people rather than two, on top of his/her own self, and considered the actions of all before deciding to go with his/her own plan (which is something neither the twins, nor Emplate would have approved). Confused yet? Thankfully M-Plate didn't have long to act before being shattered by Gen-X. It is unknown if the real Monet can fuse with her siblings the way Emplate and the twins can.
 * The DC Comics character Firestorm is a Power Booster example. While the nature of the fusion has varied considerably over the course of the character's history, the basic gist is that the host of the powerful Firestorm Matrix can merge with someone else to become the superpowered Firestorm. The other partner in the merge ends up as a voice in the host's mind, able to advise them if need be.
 * The post-Blackest Night incarnation of Firestorm is a fusion of Jason Rusch and its first host Ronnie Raymond. There are a couple of problems with this: 1) the Firestorm Matrix is messed up for some reason (possibly related to Ronnie coming back from the dead after Blackest Night) and 2) Jason hates Ronnie since the latter's Black Lantern incarnation murdered Jason's girlfriend Gehenna by turning her into salt.
 * Come DC's 2011 relaunch, the whole thing gets shaken up. Shortly after Ronnie and Jason meet for the first time, they get transformed into separate Firestorms, who can combine to form a nuclear monstrosity called Fury.
 * The walking Continuity Snarl that is Hawkman. On a number of occasions, his various conflicting selves were fused just for the purpose of cleaning up his continuity.
 * Rebis in Doom Patrol (version by Grant Morrison) is a literal example of The Composite with three beings, i. e. Larry Trainor (male), Dr. Eleanor Poole (female) and the mysterious "negative spirit". The name Rebis denotes precisely the philosopher's stone, intended as fusion of complementars (Alchemical Marriage). The Composite Rebis is a divine hermaphrodite, usually concealed in bandages. Rebis has all of the memories of all three beings and a lot of powers. Finally, he/is/it is immortal, though this might involve some ritual involving a supermarket trolley and a tree that grows on the Moon and god Grant Morrison smoked a lot of things back in the 90s.
 * The various versions of Captain Marvel usually are Switchers; the one owned by DC Comics goes between his powered-form and Billy Batson by shouting Shazam!, and several of the ones owned by Marvel Comics switch between themselves and Rick Jones by hitting together the Nega-bands (as an homage to the Batson switch).
 * Likewise, Miracleman/Marvelman (and cohorts) do their transformations in the same way; the super-powered body is stored in a sort of nullspace until the transformation occurs, and the normal body is there until the superhero changes back.
 * Peter David's run on the Marvel series once lampshaded this by having Rick yell "SHAZAM!" when hitting the Nega-bands. When Cap asks him why he yelled that, Rick changes the subject.
 * Darkdevil from the Spider Girl/MC2 'verse is the result of one of these between Daredevil and Ghost Rider. He appears to be a Composite but is really more of a Power Booster. With, possibly, some spider-powers he got from his dad.
 * Witchblade uses all 3 main variants at once: when it's time for a little shredding, the symbiont (Witchblade) transforms the body (and clothing, optionally) of its host ("wielder") into an absurdly powerful composite form (including a sort of Lingerie Armor and in the process provoking emotional and mental changes that emphasize destructive and Stripperiffic qualities). The Witchblade is at least semi-sentient, and in the anime it subjected its completely unaware host to the first transformations on its own initiative, which qualifies it as a switcher variant too. Mostly the host just carries it as an inert and innocuous ornament (power booster) (moreover, in the anime it's shown implanted but knocked out for years, inactive and near invisible).
 * In Bionicle, any three Toa of different elements can merge and form a Toa Kaita. The only exception is a Toa of Light and an evil Toa of Shadow (technically not a Toa anymore, as Toa means "hero"), since the two elements cancel each other out. The Kaita fusion merges the three minds into one, creating a new being wielding their powers along with a boost in strength. Other creatures have also shown the ability to form a Kaita, most notably the mechanical Bohrok, Bohrok-Kal and Rahkshi. So far, only the Rahkshi have gained new powers from merging. If a Kaita's mind lose concentration, it will split into the individual beings again. In addition to Kaita there are also a Matoran Nui and Turaga Nui, which combines six beings instead of three. However, these tend to last shorter, as the concentration required to maintain it is immense. Legend has it that a Toa Nui could be formed, rivaling even the power of the Great Spirit Mata Nui. However, Word of God says that it is not possible.
 * The Kaita so far shown are Akamai (Tahu, Onua and Pohatu), Wairuha (Lewa, Gali and Kopaka; plus its upgraded Toa Nuva version), Bohrok Kaita Za (Tahnok, Nuhvok and Pahrak (coincidentally the same elements as the Toa)), Bohrok Kaita Ja (Lehvak, Gahlok and Kohrak; plus it's Kal-version), Rahkshi Kaita Za (Tuhrak, Lehrak, Kuhrak) and Rahkshi Kaita Vo (Vohrak, Guurahk and Panrahk). Yes, Bionicle characters of the same elements and species tend to have similar sounding names; why are you asking?
 * And of course, all these are represented by using the instructions put together from the individual Bionicle instruction manuals to build a new, bigger model from all their parts combined. The spiritual predecessors of the Bionicle, the Slizers and Robo Riders, also had this feature.
 * The main versions of Ghost Rider are usually composites. Whether or not they're stronger together depends on the ingredients.
 * Sleepwalker is an example of an accidental Switcher situation—Sleepwalker is an alien native to another dimension who became stuck in the mind of a guy named Rick Sheridan. Sleepwalker could freely enter the real world only when Sheridan was asleep. Except for a brief Freaky Friday situation or two, Rick's body remained alive, normal and in bed when Sleepwalker was loose, and they could only communicate through Rick's dreams.
 * The Sleepwalker series also had a villainous example late in its run when a demon from the Mindscape, Sleepwalker's home dimension, became trapped on Earth and ended up fusing with a human Serial Killer named Jeremy Roscoe. The result was a nightmarish creature that called itself Psyko, possessed of all of Sleepwalker's warping powers in addition to being able to brutally Mind Rape his victims and drive them insane. Psyko was somewhere between a Biological Mashup and a Power Booster, as Roscoe was in full control of their body and the demon's powers, although apparently the demon could still communicate with him. In his first battle with Sleepwalker, Psyko claimed that the demon wanted to give Sleepwalker a message, and to write it in the alien hero's blood.
 * One issue centred around Rick and Sleepwalker being fused into a Biological Mashup after Rick tried to release Sleepwalker while he was awake and it had Gone Horribly Wrong. Being directly fused with Rick drastically weakened Sleepwalker's powers, to the point where they weren't even half as strong as they normally were. Even then, they still managed to defeat the Chain Gang. Go figure.
 * Another Switcher example was the late 80's-early 90's Thor. The Bearded One had befriended a human named Eric Masterson, but when Eric was almost killed on the fringe of one of Thor's battles, Thor used Asgardian magic to merge their forms and save his buddy's life. Thus you had Eric living his everyday life, but running off at any sign of trouble to stamp his cane on the ground and ta-da! Thor.
 * In Sonic Universe's "30 Years Later" storyline, we find that Tikal and Chaos have fused into one Composite, Tikhaos. It seems to have some semblance of Tikal's personality, but Chaos' hunger for chaos energy.
 * In Elf Quest after Winnowill's body is killed Rayek absorbs her spirit to prevent it becoming a force of destruction. Since then the two have been vying for control of Rayek's body; on those rare occasions when Winnowill succeeds she can re-shape it into an exact replica of her own. They're not exactly a composite since their personalities remain separate, though it's implied that this may change if ever Winnowill ever renounces her evil ambitions.
 * Batman and Superman once found themselves in a world where the villains were Composites of their respective enemies. Examples: Lex Luthor + The Joker, Doomsday + Deathstroke The Terminator, The Penguin + Metallo, etc. The heroes were Composites of Justice League and Teen Titans members, although Wally West was the same because he's on both teams at the same time as The Flash. Examples: Hal Jordan + Dick Grayson, Raven + Zatanna, Starfire + Black Canary. Even Gotham City and Metropolis were combined into Gothamopolis.
 * Cypher and Warlock of the New Mutants could merge into a Biological Mashup, which usually looked like Cypher covered in circuitry. In fact, Warlock could do this with anyone, except that he risked transforming them permanently.
 * Jitterjack from Astro City is a villainous composite. He appears as two bisected men joined together lengthwise, with more than double the speed, reflxes, and agility of a normal person.
 * The Metal Men can merge into a composite form called Alloy. This ability first appeared in Kingdom Come, then migrated into the main continuity during the DC One Million event.

Fan Works
"Ashika: Guess what? I made the impossible possible! Now if you thought the incident with the 14th Angel was disgusting, then I suggest you avert your eyes! (kills two MP Evas) Still think you can beat me? I'll destroy you all and I won't even break a sweat. Take this! (stomps an MP Eva to death) Three down, five to go. Any more volunteers who want to die?"
 * In Pokémon Master.
 * A powerbooster variant happens with Triverion, . It also happens with.
 * Neon Genesis Evangelion Season 2 has one. When Asuka and Shinji was losing against the Black Angels Oholah and Ohlibah (sorta like a demonic version of Israfel), they achieved a 500% synch ratio and unwillingly did a Composite variant, creating Unit F-01 (arms and eyes of Unit 02, head and torso of Unit 01 plus ten wings). When they did it again, the pilots also merged with a rather unique result: if Shinji is Butt Monkey and Asuka is Tsundere, Ashika is Badass with a capital B.


 * Fanarts of a unified Germany and Italy can be found on Deviant ART. They are usually composites.
 * Sleepwalker and his human host Rick Sheridan ended up becoming bonded with one another. Sleepwalker became trapped in Rick's mind and could only emerge when he fell asleep or unconscious. One notable occasion reversed the fusion and Rick's consciousness ended up in Sleepwalker's mind, which allowed them to temporarily return to Sleepwalker's home dimension, the Mindscape.
 * High Octane Nightmare Fuel example of the shapeshifting type in Winter War. Aizen's Hollowification experiments fuse shinigami with their zanpakuto, the results being Tortured Abominations who still retain enough awareness of their situation to make the whole matter even more horrific.
 * Buffy and a potential-Slayer Faith do a Mental Fusion version in I Am What I Am, a Buffy the Vampire Slayer Peggy Sue fic by M. McGregor, in which Buffy's mind/soul supports and imbues Faith with super-Slayer powers. They manage this twice in the story -- once, before they even really meet, and.

Film

 * In Robo Geisha,
 * The Station aliens in Bill and Teds Bogus Journey can body-slam into each other to form a larger, muscular alien.
 * At the end of The Dark Crystal, the surviving urRu and Skeksis are rejoined into their original Urskek forms.

Literature

 * Michael Moorcock's Elric temporarily merges with two of his Eternal Champion alter egos from different worlds in order to save the multiverse. They become a three-headed, six-armed superbeing. An another opportunity, he merges with three of them.
 * Moorcock is obviously very fond of this trope. In the protagonist merges with his (female) rival to create a hermaphroditic superhuman. And in  something similar is attempted, but the experiment fails because they just didn't have the technology yet.
 * In Emily Rodda's Deltora series, mild Steven never has to fear danger, for dwells within him, and at the first sign of danger can rise to the surface and destroy every living creature within the reach of his fists. While Steven doesn't fear, he has on several occasions suppressed his emergence, since  doesn't distinguish between friend and foe and would kill even the young heroes if they got near him.
 * At the end of Piers Anthony's Unicorn Point, after merging the worlds of Photon and Phaze together, The entire sentient population of Phaze became Switchers, merging with their opposite number from Photon. The only exceptions were Photon residents who hadn't been on the planet long enough to have gained an "other self," or those whose alternate selves happen to have died.
 * In the Whateley Universe, the twins Phobos and Deimos sometimes fuse into a more powerful being that has the heads and limbs and tails of both of them, along with a fear aura so powerful that it rips up reality around itself.
 * The Composite happens during a battle with Lucifer in the book Magnus by Matthew Dickens.
 * In The Moment of the Magician, Jon-Tom fights a spellsinging duel against four demonic creatures, whose bodies gradually fuse into a literal one-man-band.
 * Codex Seraphinianus has a page or two (which usually also doubles as cover art) of a human man and woman fusing together to form an alligator, and provides a very detailed and somewhat unsettling series of images of their bodies merging into a single creature.
 * In City of Illusions by Ursula K. Le Guin, two minds who have lived sequentially in the same body (after one was erased and the other grew in its place, then the first one was restored) end up in joint control. Since their enemies have told a different story to each of them, they are able to see through the lies by working together.
 * In Storm Constantine's Burying the Shadow, the eloim naturally have sex through fusion dance. Occasionally the fusion will be permanent, resulting in a creature called a Harkasite. The practice is largely taboo by the beginning of the book in favor of more human sexual behaviors.

Live-Action TV

 * Power Rangers in Space: Darkonda can force Ecliptor (and possibly others, though we've never seen it) to fuse with him, becoming Darkliptor. Darkliptor has the design and weapons of both, but the voice and will of Darkonda only. (Ecliptor has been able to force a separation, but not control the combined form.) Another case of a Power Booster that looks like a Composite.
 * Power Rangers Mystic Force has Nick gaining his "battlized" form from fusing with a dragon, Fireheart. Again, Power Booster disguised as Composite.
 * A rare live-action example occurred in an episode of Star Trek: Voyager, in which Neelix and Tuvok are accidentally merged together. The new hybrid character "Tuvix" (played by a new actor) didn't want to be separated, and Captain Janeway did it by force. Tuvix had several of the positive traits of both component beings, including a sense of humor (which Tuvok didn't have) and edible cooking (Neelix was a decent cook, but all the dishes he knew how to prepare were radically different from Alpha Quadrant tastes).
 * Buffy: in the climax of season 4, the Slayer temporarily merges (mentally) with her three sidekicks to acquire Willow's magical talent, Giles's obscure knowledge, and Xander's Heart. (If you're thinking so what, go watch any number of episodes where he demonstrates non-powered bravery.)
 * Kamen Rider Den-O has a form of Composite and Power Booster fusions. Ryotaro (and to a lesser extent, Yuuto) contract with various heroic Imagin who possess their partners. This results in the possessed human's body being controlled by the Imagin and speaking with his voice while gaining some outward physical changes (like glowing eyes and a lock of hair, both in the Imagin's personal color). This also extends to their Rider forms, where an Imagin taking control causes the Rider suit to change armor, weapons, and abilities based on the Imagin's personality.
 * Kamen Rider Kiva does the Power booster example. Kiva gains alternate forms by using his Fangre allies as weapons.
 * Kamen Rider Double uses a similar Composite/Power Booster setup, except that instead of a Monster of the Week, the protagonist Shotaro gains the consciousness of his human partner Philip when they transform into the titular Rider (Phillip's body falls unconscious as long as Double is active). Double himself speaks with the voices of his individual parts in unison, though both halves can also engage in conversation with each other. Mid-Season Upgrade FangJoker reverses the dynamic, using Phillip's body and Shotaro's mind, while for Double's Super Mode CycloneJokerXtreme, the Transformation Trinket actually absorbs Phillip's body and merges it with Shotaro for a true Fusion Dance.
 * The Ultra Series often uses a Switcher-type for its heroes, having an alien Ultra-being bond with a (typically recently dead) human. Ultraman Ace actually had a double example, with Ace bonding with two humans, a man and a woman, who would then fuse together to give him control.
 * There have also been composite types.
 * Ultraman Cosmos and Ultraman Justice fuse into Ultraman Legend.
 * Ultraman Mebius, Ultraman Hikari and the crew guys fuse into Ultraman Mebius Phoenix mode.
 * Ultraman Mebius can also fuse with the first six ultra heroes to become infinity mode. This is more of a power booster.
 * Ultraman Zero, Dyna and the before mentioned Cosmos fuse into Ultraman Saga.
 * Dollhouse: Echo and Alpha are both prime examples of this; to a lesser extent, other dolls are as well.
 * Even the individual imprints are, since they are usually composites of different people made into one personality.
 * Hyakujuu Sentai Gaoranger; After being reduced to puddles of goo, the three Highness Duke Orgs are combined into the Ultimate Org Senki, who possesses elements of all their bodies.
 * In Kaizoku Sentai Gokaiger, when Gai can't decide which of Go-onger's Sixth Rangers he wants to transform into, the keys combine into one that has the power of both Go-on Wings. A Composite type, since the suit is half-and-half, and Gai has two Rocket Daggers available.
 * He does it again later with the GokaiRed and GokaiGreen keys, in a one-time fusion to create GokaiChristmas.

Tabletop Games

 * In Magic: The Gathering, Feral Shadow, Breathstealer, and Urborg Panther can fuse to form the Spirit of the Night. Well, that's the flavor of it anyway.
 * The background fluff also has a Power Booster example: The plane of Rabiah was split into 1001 individual versions, each with a counterpart for each resident of the original, except for one man, Taysir, who was reflected only five times (one for each colour of mana). The black Taysir was manipulated into fusing with each other Taysir, which resulted in him becoming the most powerful planeswalker in the multiverse until Urza ascended.
 * More recently, there's Karona, a merging of three women.
 * Planes tend to merge and split a bit. This can be quite jarring to the inhabitants, as in Alara or Kamigawa, and it was actually the entire point of the creation of Rath.
 * Mechanics-wise, Rath has a race called Spikes, 0/0 creatures (in other words, too weak to live) who come into play with +1/+1 counters (making them strong enough to live), but you can remove them to put them on other creatures, or for other effects. You can also equip one living weapon on another living weapon.
 * In Exalted, there's a Solar Circle Sorcery spell called "Unity of the Closed Fist" found in the White Treatise. It creates the composite variant but adds all the elements of the different types of Exaltations involved. It can combine up to five individual Exalts, thus the name—five fingers making a single closed fist.
 * Alchemicals have a version known as Synthesis of Divine Affiliation, which can affect six instead. However, the only way that you'll be using it to fuse one of each caste of Alchemical is when everything has gone to hell, because the sixth caste are supposed to go completely unseen until at least four varieties of brown gooey substance have hit the fan.
 * In the Geist: The Sin Eaters, Sin-Eaters are the power booster type, having a Geist that fused it's soul with theirs, giving them ghost-like powers and abilities, as well as near immortality. The Caul Manifestation takes this one step further, as the Geist (which is usually just a presence in the back of the Sin-Eater's head) literally merges with the Sin-Eater, enhancing his form and granting him new powers.
 * And in the Old World of Darkness, the Blood Brother bloodline of vampires naturally came in packs that could fuse together into a grotesque Biological Mashup.
 * In Deadlands, a Harrowed is formed by fusing a deceased man and a demon. It's a Switcher, because only one of the two is in control at any time, but they share the powers pool. In case of the good Harrowed, it's also Enemy Within.
 * In 3.5 Dungeons & Dragons has a high level power called, Fusion, for Psions who specialize in Egoism. The power lets the user combine with a willing creature taking on all their abilities, combining hit points, the best of saves, skills, attacks, and ability scores. If both used psionics they even combined their power point pool.
 * The Ritual of Union in Unknown Armies is a power-booster version, with a few twists.

Toys

 * In Bionicle, three Toa are able to fuse to form a composite "Toa Kaita", which has the combined powers of all the participants and a fused personality.
 * Also notable is Takutanuva, the merged light/dark being formed when Takanuva switches masks with Makuta while submerged in Energized Protodermis. It appears to be a Composite type, although the personality seems more akin to Takanuva than Makuta.

Video Games
"Utsuho Reiuji: The ultimate energy is nuclear fusion power! Won't you fuse with me?"
 * Blue Dragon has Ultimate Szabo, which is all five Demon King Robots at once.
 * Several occurrences of this appear in the Breath of Fire series:
 * The first game has Karn, whose only "power" is his ability to fuse with other party members to create powerful fused forms. The power is entirely missable, which can make Karn entirely useless. Not to mention he gets a form which can only be used underwater after the only underwater section in the entire game has finished.
 * Ryu's Infinity Plus One Dragon in the first game also allows him to absorb all his partners to form one giant dragon with physical features from all of them. It always does maximum damage with every attack, making most bosses a breeze.
 * The two bosses Balio and Sunder from Breath of Fire 3 perform their own fusion to fight the protagonists. Ironically, it's the only defeatable form; all but one of its attacks are toned down versions of attacks the two had separately, and it can only perform one attack per turn versus two for the two separately. Ouch. Its appearance is also a major Shout-Out to Ultraman, complete with an energy beam performed with the distinctive L arm pose.
 * There's also a Miracle gene and Tiamat form in BoF3, which allows replaces the party with one gigantic dragon. (The Fusion gene might seem like an example, but Ryu never absorbs other party members when using it; he just copies their attributes.)
 * In Breath of Fire 2, powering up your teammates takes the form of fusing them with different elemental Shamans. This can have minor effects (turning Sten's fur red) to major effects (changing the nigh-Joke Character Jean into one of the game's most powerful characters).
 * At the end of Darkstalkers 3, Lilith fuses with Morrigan as a Power Booster. Lilith was originally part of Morrigan, split off precisely because their combined form was strong enough to threaten dimensions and the established order. Due to the time they spent apart, they still got more powerful, by being able to split in order to do two-pronged attacks.
 * Near the end of Legacy of Kain Defiance, do the Power Boost version.
 * In the Mega Man series, Mega Man and Bass can perform a Power Booster fusion with their respective canine companions (far more often for Bass, Mega Man only did it in 6 and 7).
 * Soul Unison (DoubleSoul) in Mega Man Battle Network. It allows MegaMan.EXE to (composite) fuse with other Navis and gain some of their abilities.
 * A special type of fusion occurs at the end of Battle Network 3 when This eventually allows synchronization in subsequent games: when MegaMan.EXE scores a counter hit or is performing well, he becomes more powerful as a result of being "in sync" with Lan. But when he performs badly, he becomes more vulnerable as a result of being "out of sync".
 * In Mega Man Star Force, the hero(es) use(s) a combo composite/switcher. Geo lives his life normally until the baddies attack, and then he turns into the "Mega Man" of the series, which involves fusing him with energy being alien Omega-Xis.
 * Mega Man X had a few characters who could join together as Composites; for example, Bit and Byte of X3, who become Godkarmamachine O Inary.
 * Mega Man ZX has Biometals (Livemetals in the Japanese version), . The Biometals act as a Power Booster for humans and Reploids, turning them into "Mega Men" and granting them armored forms and abilities.
 * This Power Boosting system also has a Composite function; once the player finds both the Model X and Model Z Biometals, they can fuse with both at the same time to become Model ZX in what's called Double Megamerging. The titular transformation is only one of the six Double Megamerges (out of seven forms). (In the sequel, the player only has a single Biometal—Model A--that can copy the forms of other characters and Biometals without actually fusing with them).
 * Every Golden Sun game ends with one of these as the final boss.
 * The Fusion Dragon is a fusion of Saturos and Menardi.
 * The Doom Dragon uses
 * The Chaos Chimera uses
 * In StarCraft, two Protoss Templars can fuse into a single, ultra-powerful 'Archon' unit. It is a one-way process, and falls outside the three main types, since the brutal martial prowess of the Archon is quite different from the casting abilities possessed by the Templars. It's explained that, while Templar are very powerful with directed psychic abilities, Archons are the embodiment of raw psychic energy.
 * The process is inverted by the martially-deadly Dark Templars that can merge to form a Dark Archon—which have a few very powerful "spells", but are completely useless in battle when they're low on mana.
 * In Starcraft 2, both the Dark Archons and the announced Twilight Archons were ditched and now any combination of templars results in a conventional Archon.
 * In Soul Nomad and The World Eaters, the main character is the 'victim' of a botched Demonic Possession by Omnicidal Maniac ex-Big Bad Gig, which ends with the two Sharing a Body and Gig effectively becoming the main character's Power Booster on a permanent basis. It has the side effects that Gig isn't exactly the most pleasant being to coexist with—and that drawing too much on his power will complete the possession to a manner more to his liking.
 * In all the Disgaea games, monster-type enemies can be merged by throwing them together—effectively a Power Booster, in that the fused being is the highest-leveled component monster with a boost in levels equal to the level of the weaker monster. Disgaea 3 also had the Magichange ability, which enables a monster to temporarily transform into a weapon for a human character, which enters into this trope mainly for those that turn into Fist-type weapons. (In all cases, the Magichanged monster provides both its main ability, and a percentage of its stats, to the wielder—but for most non-Fist versions, it more closely resembles an Empathic Weapon.)
 * Expanded on in Disgaea 4: A Promise Unforgotten, where a monster can literally do a Fusion Dance with another one to supersize it, giving it increased stats across the board, and an increased range/radius on its attacks, among other things. It can still magichange in this state, as well, which gives a humanoid a ridiculously huge weapon that increases the range and radius of all their skills, ontop of the usual magichange benefits.
 * In Dragon Quest Monsters, you breed monsters together, the results of which are frequently a Fusion—especially when dealing with the Slime. for example, breeding a Slime (looks like a blue hershey's kiss) and a Golem (looks like a man made out of bricks) gets you a Rockslime, which looks like a Hershey's kiss made out of Bricks.
 * In Lunar Knights, Lucian and Aaron can merge with the dark and light terrenials, respectively, to enter a more powerful form, although it has a fairly short duration.
 * In Persona 3, the Main Character can create new Personae by fusing two or more existing Personae together. The new Persona can inherit attacks from any or all of its "parents" (including some that it wouldn't learn naturally).
 * The original Persona allows the main character to do something similar, but using cards containing the essence of demons.
 * Most of the other games in the of Shin Megami Tensei series let you do fuse demons directly; in the continuity comprising 1, 2, If... and Imagine, it's All There in the Manual (and visually explicit in Imagine) that this effectively kills the original demons in the process.
 * In Nocturne, there are standard fusions and "sacrifice fusions." Entering a certain door with either the first pixie who joined you or a demon made by fusing her suggesting that using a demon as a sacrifice will kill them, but regular fusion, not so much.
 * Rather brutally explored in Strange Journey:
 * In Digital Devil Saga, the lead male and female, Serph and Sera, fuse into one ultimate being named Seraph; while the result is mostly controlled by Sera due to Serph being a Heroic Mime, it is stated their minds would eventually merge the same way. This is explicitly a reference to the Hindu religion, where the perfect being is said to be a fusion of both the female and male aspect. An example in Hinduism is Ardha, the fusion of the Shiva and his wife Parvati. This may not apply to all sects of Hinduism though; being Older Than Dirt, Hinduism has so many different sects and interpretations that your head will explode trying to figure out the contradictions.
 * In Star Control II, the Mmrnmhrm (a mechanical sapient race) and the Chenjesu (a crystalline race) are eventually discovered to have merged into a gestalt composite race, the Chmmr. Once they join your alliance, they are able to provide you some small assistance with your combat capabilities.
 * Masa and Mune in Chrono Trigger fuse after getting their individual butts kicked while testing potentials to wield the Masamune. The result is pretty... chubby, for some reason.
 * Obviously, their fingertips were misaligned.
 * Makes you wonder how powerful they'd be if they got the fusion dance right.
 * Dream, or Doreen, merges with them in Chrono Cross. They all inhabit the Grand Dream, or Mastermune.
 * The Time Devourer of Chrono Cross is a Composite fusion of
 * We also see Harle, the Seventh Dragon, doing the Fusion Dance with the other six dragons.
 * Some Slimes in the Dragon Quest series can band together to form a King Slime. You can tell right away that they're different from garden-variety Slimes because they take slightly more damage than normal, and they always call for help.
 * For most of Illusion of Gaia, Will is a Switcher: he lives the normal life, but he can take the form of the Dark Knight Freedan or the Light Knight Shadow (don't ask) when he explores dungeons. At the very end of the game, however,
 * The main premise of the old NES game Monster Party was that Mark, a kid with a baseball bat, and Bert, a flying gargoyle dragon thing, fused together to fight monsters in the Bert's home, the Dark World. Most of the game is played as Mark, who only transforms to Bert when he scoffs down pills that are just lying around. It is a mystery why Bert needed Mark, since the Bert form is entirely superior.
 * Gaia Online had an entire subplot where Gino had, unbeknownst to everybody (possibly including himself), fused with his "dead" father, making him into the badass superhero The Masque at the expense of making him unpredictable and violent, particularly towards Ian (who felt likewise about him/them). The reveal came when the local Mad Scientist injected him/them with a catalyst that caused them to split, ending that plotline and setting up the next with an Earthshattering Kaboom.
 * Marathon gives us an example with two non-physical characters. Near the end of Infinity, the player character merges his AI With An Internet Connection Durandal with the ancient alien AI Thoth. The resulting character is a Composite of the two, although thankfully he doesn't seem to posess some of the traits of Durandal or Thoth.
 * In Kingdom Hearts II, Sora can use his party members as Power Boosters using the Drive System. For example, Sora's Valor Form involves absorbing Goofy.
 * In The Legend of Zelda Ocarina of Time, the Twinrova witches merge into a composite form for the second half of their Boss Battle.
 * In the Touhou Project series, Utsuho Reiuji (a hell raven youkai) received a Power Booster of sorts by eating the body of a yatagarasu (a divine sun crow), . As a result, she now has power over nuclear fission and fusion, and her body has changed somewhat as well—she now has the yatagarasu's third eye on her chest, a control rod (the "yatagarasu's third leg") on her arm, and "feet of fission and fusion". Talk about one Hell of a Fusion Dance!


 * The Touhou fandom seems to like making Utsuho herself an unwitting Power Booster for others, such as Mokou Fujiwara, Nitori Kawashiro, and Tenshi Hinanai. Becoming a part of someone else, rather than them becoming a part of her, is probably not what Utsuho had in mind ...
 * And then there's Utsuho's actual Fusion Dance.
 * For the Final Boss of Tomb Raider: Legend, Amanda merges with the Unknown Entity.
 * This is how each of the power-ups work in Sonic Colors — Sonic merges with the Wisp to gain its powers.
 * The final boss of Tron 2.0 is a monster formed from the three main antagonists after their botched attempt to digitalize themselves.
 * The entire point of Trine is that the three main heroes become a Switcher single main hero due to the titular artifact.
 * Using Baton Pass in Pokémon can transfer stat boosts from one Pokemon to another.
 * In Freedom Force, a blind female witness and an idealistic rookie cop get hit by Energy X and merge into a switchable superhero named Law and Order. The witness becomes Law, who is appropriately blind, and is armed with a sword. The cop becomes Order and is armed with a massive gavel. Only one can exist at any given time.
 * Similar to the StarCraft example, the Viron units in Ground Control II are able to merge into other units, although the new units are not necessarily more powerful. Unlike Starcraft, this process is entirely reversible, making Virons pretty versatile.
 * In Pocky & Rocky 2, Pocky can use Magic to fuse with his partners as a Power Booster (though there are a couple she just rides instead).
 * In Dragon Age non-demonic spirits who possess a mortal seem to be Switcher/incomplete Composite types. They're always present in mind, and their personalities do influence the other, but the spirit can also take over. In Wynne's case, the spirit of Faith only takes over briefly to protect her with healing and buffs. Anders is a gifted healer who switches mode to deal the more powerful offensive magic that only Vengeance is capable of. Sometimes Vengeance appears to seize control against Anders' will.
 * In the Fallout series, creatures called Centaurs are made by putting more than one creature into a vat of the Forced Evolutionary Virus. The results are not pretty.
 * In Little Fighter 2, Firen and Freeze can merge into the super-powered Firzen, but only one player gets to control him, so the other has to sit out until they decombine.
 * The obscure 1989 Namco shmup Dangerous Seed has an example in the last three bosses before the final stage. Allowing the st. 5 or st. 6 bosses to escape leads you to a different planetary orbit, with a boss consisting of a mashup of the boss who escaped and the boss who you'd normally fight there. What makes this really interesting is that if you allow Multi-Squid (st. 5) to escape, then let its fusion with Shark-Mouth, Monster-Head, escape the next boss fight, the new seventh boss, Ultimate-Tiger, is a Monster-Head/Twin-Claw fusion. In other words, it's basically three bosses fused together. Have fun!

Fan Games

 * Battle Moon Wars gives us the ninja RoSHIaKI, a fusion of Michael Roa Valdamjong and Tohno SHIKI.
 * Mushroom Kingdom Fusion uses the Power Booster variant: The playable characters can gain forms representing popular characters that are not playable. For instance, Mario has a Mega Man form and a Master Chief form, and Luigi has a Protoman form and a Red Spartan form.

Web Animation

 * Red vs. Blue explores all three examples. Project Freelancer was a military experiment that implanted AI partners in the minds of their top soldiers, intending to get the "Power Booster" result. However, some Agents instead became "Composites" as the personalities and desires of the human and AI became intermingled. And in at least one case, a powerful and dangerous AI is able to hide within a host as a "Switcher," eventually taking over the body to wreck some havoc. Some AIs even adopt a new title based on a fusion between their partner's name and their original Greek letter designation.
 * Eskimo Bob In the special, "Return of the girl", Bob and Alfonzo (or rather there clones) can do the Composite example by doing the animation the originals do in the beginning of each episode. The Penguin and Sams can do the power booster example with the help of the alien business men. And The Fish in a space ship can do this with the Fishticons.
 * The Movie of TV Tome Adventures ends with Bizarrely, the merged form doesn't merge their characteristics at all, simply having the left side of the body look like one character and the right side looking like the other. Both of them have equal control over the resultant body, and have to work in perfect sync.

Web Comics
": You're a killer and I'm a politician. Fusing us would just turn us into !"
 * In the animated webcomic Kid Radd, the Damsel in Distress love-interest Sheena (who subverts her assigned role at every turn) winds up merging with what was, essentially, a dying, future version of herself. In her normal form, she's an NPC--Invulnerable Civilian, but incapable of attacking... her future self is a Hero, however, and thus capable of powerful attacks, while sacrificing the inherent invulnerability of the NPC. Thus, this is a Switcher type.
 * Kid Radd also contains a structure designed with Lost Technology that causes Composite fusions of characters. This is crucial to the villain's Evil Plan: . It would have worked,.
 * There is also Gnarl and Kobayashi, two minor villains who end up
 * Also resulting in one of the better lines from the comic:
 * In Ansem Retort,.


 * Parodied in Problem Sleuth, in which Ace Dick uses Belly Of The Whale to absorb his alternate form clones, Zombie Ace Dick and Fiesta Ace Dick, gaining their powers. This results in Ace Dick becoming
 * In Jack the twin demonic personifications of Gluttony share the same body with one in control of it and the other's face sticking out of the crotch, switching seemingly at random.
 * Near the end of Fite!,.
 * Parodied in Paranatural with the "friendship fusion", which is really just three kids standing on each other's shoulders.
 * In Homestuck, during Act 6, Gamzee forcibly prototypes a Kernelsprite with the bodies of, creating the unholy abomination known as sprite.
 * In the Sonic the Hedgehog fanimation Nazo Unleashed,

Western Animation

 * The 2000s Teenage Mutant Ninja Turtles animated series features an involuntary fusion of two villains, Drako and The Ultimate Ninja, into a powerful but Nightmare Fuel-inducing form.
 * Transformers loves this. You've got the gestalts like Devastator; Optimus Prime and, well, lots of things; and the "Spark of Combination" pairs.
 * Given that they're Mechanical Lifeforms, they kinda toe the line between this and Combining Mecha.
 * Groups like the Constructicons or Aerialbots are Combining Mecha. The 'Spark of Combination' from Energon would count as this trope, as would Optimus Prime's combined super modes from Cybertron as Composite/Powered Up combinations.
 * An episode of The Superfriends had Green Lantern using his ring to fuse himself and Superman to deal with the day's Negative Space Wedgie.
 * The second Season Finale/last episode ever of Legion of Super Heroes featured a Composite of Superman and his clone-from-the-future (er, further into the future), Superman X. It was accomplished with Saturn Girl's Psychic Powers, as it was technically a Battle in the Center of the Mind.
 * Avatar: The Last Airbender: The Avatar State is a Composite and Power Booster at once, with a bit of Switcher mixed in. It allows the current avatar to have the skills and knowledge of all the avatars before him. In moments of extreme danger or emotional distress, the Avatar State awakens by itself, and the current Avatar has no control until the danger/angst has passed. Additionally, in certain circumstances, the avatar can take the physical form of a previous avatar. Aang was able to turn into Roku while inside his temple, and Kyoshi while wearing her artifacts. Also, while not actually resulting in a fusion, Book 3 had an episode where Aang and perform a fire-bending "form" that very much resembled the DBZ fusion dance at several points and was called the "Dance of the Dragons". This is likely a Shout-Out as the creators are anime fans.
 * Fanmade sketch showing the result of said fusion.
 * In the short-lived Mortal Kombat Defenders of the Realm, Nightwolf was the team Smart Guy and seldom joined the others in battle, preferring to stay back with his pet wolf and man the computer systems. When important missions did require him to accompany the team, he would merge with the wolf as a Power Boost when kombat got thick and open a can of whoop-ass on the Mooks. It was quite awesome to see and helped to break the monotony of the show, though he only did it like three times over the course of the series.
 * An episode of ReBoot had main villain viruses Megabyte and Hexadecimal merge (via a third component, a Web Virus) to make an even more powerful hybrid called Gigabyte, who is specifically said to have both Megabyte's strength and Hexadecimal's special powers.
 * Season 4 revealed that this fusion was more of a recombination; Megabyte and Hexadecimal used to be a single virus, Killabyte, who upgraded into Gigabyte and then split into Megabyte and Hexadecimal shortly after being portaled into Mainframe.
 * In Season 3, Bob performs a Power Booster. He.
 * In Ben 10, Ben unintentionally does the Mixed Form variant in "Dr. Animo and the Mutant Ray". Additionally, there was a promotion where Bandai sold Ben 10 toys that had codes. Typing two of the codes on the Bandai Ben 10 (now classic) website to see what two of Ben's aliens would look like fused together. With the absence of Grey matter and Ripjaws's codes, Stinkarms was the only form from the episode that could be recreated, though many fusions created separately could be made.
 * Done on purpose in the Crossover episode Ben 10/Generator Rex: Heroes United, with Upgrade!Ben serving as a Power Booster for Rex. The background even showed a fused version of their logos.
 * In the Gargoyles episode "Grief", a magic scroll fuses an avatar with Anubis, god of death. Pack member Jackal interrupts the ritual for it and combines with him, causing some prime Nightmare Fuel in the process.
 * In Danny Phantom, Future Danny is the result of
 * Ramon De La Porta from Kong: The Animated Series frequently uses a device to merge various animals with himself to fight the eponymous gorilla. This has been utilized to create various monsters of mythology, including the griffin and manticore.

Real Life

 * Male anglerfish are basically Power Boosters to the extent that some aren't even physically capable of eating. Essentially being the fish equivalent of drone bees, their sole purpose in life is to literally sniff out a female (note: multiple times their size,) bite into them, releasing an enzyme that slowly reduces the male to literally a pimple with 'nads for a ready supply of semen whenever the female's ready to lay eggs.
 * Primary Symbiosis is the biological version of this, where two organisms (a microbe with another microbe or another larger multicellular host) become so necessary for each others' survival that they essentially merge with each other. Bacteria can become incorporated within the actual cells of its host, to the point of almost being considered an organelle. This is, in fact, the origin of mitochondria (thought to be descendants of an ancient alpha-proteobacteria) and chloroplasts (descended from a cyanobacteria), as well as eukaryotic cells themselves!