Nick Verse

This is the Nickelodeon equivalent to the Disney Channel Live Action Universe.

The Nick Verse was generally not based around deliberate crossovers, until Victorious started, which does have several crossovers all intended to push Victorious to people who might have watched older shows but not it.

Before Victorious, a blasé approach to continuity led to a melding of some quite complicated Recursive Canon-esque elements in certain Nick shows. It is sometimes called the Schneiderverse, but some of the tangentially related shows aren't created by him and due to the potential for future Crossovers the scope of what shows are in the Nick Verse could widen beyond just his shows.

Series confirmed to be in the Nick Verse

 * Drake and Josh
 * Zoey 101
 * iCarly
 * Victorious

The Nick Verse links

 * Drake and Josh
 * Gavin, Craig & Eric appear in the iCarly episode "iStart A Fanwar".
 * Helen appears in the Victorious episode "Helen Back Again" and references Crazy Steve.
 * Zoey 101
 * Stacy Dilsen appears in the iCarly episodes "iStart A Fanwar" and "iHire An Idiot".
 * Quinn Pensky is named in the iCarly episode "iWas A Pageant Girl".
 * Pacific Coast Academy's rival school, Northridge High, is mentioned several times in Victorious
 * iCarly
 * The appearances mentioned above from Drake and Josh & Zoey 101 characters in the episodes "iStart A Fanwar" and "iHire An Idiot".
 * A direct Crossover with Victorious in the episode "iParty With Victorious".
 * Victorious
 * Helen from Drake and Josh appears in the episode "Helen Back Again"
 * Tori's school at the start of Victorious is stated to be Northridge High, the rival school of Zoey 101's Pacific Coast Academy.
 * The iCarly Crossover in the episode "iParty With Victorious" mentioned above.

Series that are in the Nick Verse as a fictional show but also exist in Real Life

 * All That: Kenan Thompson references the cast of the show in the iCarly/Victorious crossover. As a sketch comedy show the actual characters aren't real like Carly, Tori, Zoey and so on are, but the actors playing them would be.
 * Fred: He shows up in the iCarly episode iMeet Fred.
 * Drake and Josh: In the Victorious episode, "Who Did It to Trina?", Cat explains a scene from a Drake and Josh episode, after which her friends explain that that wasn't real, it happened in a TV show: Drake and Josh. The show can also be seen on Carly's listings on her TV in the iCarly episode, "iPear Store".
 * Which completely contradicts the previous episode where Helen showed up, and referenced Crazy Steve.
 * Zoey101: As with Drake and Josh, the show is listed on Carly's TV in the aforementioned episode.

Actors who play characters in the Nick Verse, but also exist as themselves or other characters

 * Allison Scagliotti
 * Had a recurring role on Drake and Josh as Mindy Crenshaw
 * Appeared in the Zoey 101 episode "Backpack" as Stacy (the girl who stole Zoey's idea)
 * Daniella Monet
 * Had a recurring role on Zoey 101 as Rebecca Martin
 * Appeared in the iCarly episode "iPsycho" as "Popular Girl"
 * Stars in Victorious as Trina Vega
 * Drake Bell
 * Starred in Drake and Josh as Drake Parker
 * Appeared in the Zoey 101 episode "Spring Fling" As Himself.
 * Jennette McCurdy
 * Appeared in the Zoey 101 episode "Bad Girl" as Trisha Kirby
 * Stars in iCarly as Sam Puckett
 * Will appear in the upcoming Victorious episode "Crazy Ponnie" as Ponnie
 * Jerry Trainor
 * Played Crazy Steve in Drake and Josh
 * Stars in iCarly as Spencer Shay
 * Appeared in Victorious in the audience of Trina's one woman show in the episode "Jade Dumps Beck" and a cameo of the iCarly set in the episode "April Fools Blank"
 * Josh Peck
 * Starred in Drake and Josh as Josh Nicholls
 * Appeared in the Victorious episode "Wok Star" As Himself.
 * Lane Napper
 * Appeared in the Drake and Josh episode "Smart Girl" as the game show host
 * Appeared in the iCarly episode "iWas A Pageant Girl" as Ernie, Sam's dance instructor/partner
 * Has a recurring role on Victorious as Lane Alexander
 * Leon Thomas III
 * Appeared in the iCarly episode "iCarly Saves TV" as Harper
 * Stars in Victorious as Andre Harris
 * Miranda Cosgrove
 * Starred in Drake and Josh as Megan Parker
 * Appeared in the Zoey 101 episode "Paige at PCA" as Paige Howard
 * Stars in iCarly as Carly Shay
 * Nathan Kress
 * Stars in iCarly as Freddie Benson
 * Appeared in Victorious in the audience of Tori's play in "Who Did It to Trina?"
 * Victoria Dawn Justice
 * Starred in Zoey 101 as Lola Martinez
 * Appeared in the iCarly episode "iFight Shelby Marx as Shelby Marx
 * Stars in Victorious as Tori Vega

Fictional shows in the Nick Verse

 * The show with Zeebo from iCarly Saves TV. A producer wants to create a TV show from iCarly. After Hilarity Ensues, the show is back in it's original format, a show about an obnoxious dinosaur named Zeebo and a bratty teenage girl that has nothing to do with iCarly at all.
 * Celebrities Underwater.
 * Drew And Jerry.
 * The iCarly webshow.
 * Girly Cow.

Shows which may be in the Nick Verse but are unconfirmed

 * Big Time Rush
 * True Jackson, VP. No direct crossovers with any of the confirmed shows, although some of the actors make appearances in other roles. With production on the show now ended, it's likely the only way any confirmation will occur is if any of the currently airing shows make refernces to elements of the series.
 * Kenan and Kel. With Kenan Thompson showing up As Himself in the iCarly/Victorious crossover, it makes it unlikely. But as Drake Bell showed up As Himself and Drake and Josh are still part of the same universe, it is possible.
 * Supah Ninjas
 * How to Rock

Shows which are not in the Nick Verse.

 * The Troop. No direct crossovers. Unlikely due to not sharing any crew/writers/production company and being completely out of the genre every other show that is in the Nick Verse is part of.

People who are different in the Nick Verse and in Real Life or otherwise mentioned or notable.

 * David Schwimmer could be dead or alive, depending on if he survived his experience in Celebrities Underwater.

Tropes constant across the Nick Verse.

 * Alternate Company Equivalent: Many of the shows or stars could be considered this to Disney Channel, for example Big Time Rush to JONAS, Miranda Cosgrove to Miley Cyrus, etc.
 * Common Crossover: Daka Shoes, Pearpods (an Ersatz of Apple products), Wahoo Punch, Blix and several other real world brand Expies.
 * Continuity Snarl: The concrete canon nature that all four shows exist as reality with each other, then having the cast of Victorious say that Drake and Josh was a tv show. This came the episode after they had Helen, a major character on Drake and Josh show up on Victorious and reference Crazy Steve.
 * Celebrity Paradox: Several actors have shown up as themselves on various shows in the Nick Verse despite playing characters that exist as real in the same universe. The most obvious example would be Drake Bell showing up on Zoey 101 as himself, despite his character Drake Parker existing as a real person in the same universe that Zoey 101 and all the other Nick Verse shows are part of. This is an aversion of Celebrity Paradox.
 * Hey, It's That Guy!: Just go further up the page to see the extent of this, and just to be clear - That's just the people who've played multiple characters.
 * Jerkass: ALL!! OVER!! THE!! PLACE!! That includes the lead characters in several of the shows!
 * Laugh Track. Pretty much every show that isn't Zoey 101.
 * Loads and Loads of Characters: What happens when a canon interpretation can include every actor in addition to every role they have ever played.
 * Production Posse: Part of the reason why there are 3 or 4 different versions of people, the main force behind the shows in the Nick Verse reuses actors as well as finding future lead stars by casting them in guest or less than starring roles whilst they are younger.
 * Recursive Reality/Recursive Canon/Mutually Fictional: Probably averted (probably because of how complex these tropes are). Even though Drake and Josh exists in the same universe as the rest of the shows (as can be seen above) the Victorious episode Who Did It To Trina has the characters come out and say that Drake and Josh was a TV Show. Despite this, neither of these tropes probably (again, complex) apply.
 * You Look Familiar: In the Victorious/iCarly crossover, Freddie remarks that Tori looks like Shelby, but that Tori is hotter.