SI Prefix Name

Names starting with Mega, Giga, Tera, Micro, Nano, or any other SI Prefix. Often, characters using this prefix won't actually be a power of ten greater than what the prefix is applied to.

Often used to imply "techno"-ness, due to their ubiquitous use in computational measurement (applied to space bytes, processor hertz, processor fabrication meters).

Powers Greater Than One

 * Denji Sentai Megaranger
 * Megazords.
 * Megabyte, from ReBoot, of course.
 * And his Super Mode, Gigabyte.
 * And his predecessor, Kilo Killabyte.
 * Mega Man
 * New Super Mario Bros.'s Mega Mushroom.
 * Chrono Trigger's Giga Gaia, Mega Mutant, Giga Mutant, and Terra(sic) Mutant.
 * The Terra Mutant's name is corrected in the DS remake, where he's called Tera Mutant.
 * Giga Bowser, from Super Smash Bros.. Melee.
 * Transformers villain Megatron.
 * In the original Japanese version of Transformers: Robots in Disguise, "Megatron" was actually a colleague of his called Gigatron.
 * Mega Shadow and Giga Shadow, from Lexx.
 * The spells Mega Brando and Giga Slave from The Slayers.
 * The Villains and Vigilantes adventure Devil's Domain had the NPC hero Meganaut, a Brain In a Jar with a robotic body.
 * Sega's Mega Drive (known as the Genesis in America).
 * Darkwing Duck villain Megavolt. Oddly enough, this was not his first choice of villain name, but Megawatt was already taken by the school band.
 * Sin's One-Hit Kill Giga Graviton attack in Final Fantasy X.
 * Megadeth
 * "Finishing move! Giga... Drill... BREAKEEEEEEEEEEEEEEERRRRRRRRRR!!!!!!!!"
 * The Megalodon.
 * Pokémon games. Absorb is a basic grass type attack that does damage and restores some health to the user. Mega Drain is simply a stronger variant, while Giga Drain is the strongest.
 * Digimon has "mega" and "giga" all over the place, but the two that stand out the most are Megadramon and Gigadramon... whose Power Levels are exactly the same.
 * Giga Pudding (Puddi puddi! Puddi puddi!)
 * The recurring summon Bahamut from Final Fantasy has attacks based on the word "Flare" and some big SI prefix. The most common is Mega Flare, but some games have advanced versions of Bahamut capable of "Giga Flare", "Tera Flare" and so on.
 * Megazone 23
 * Kiloblaster

Powers Less Than One

 * Microsoft.
 * Micro Machines.
 * Micronauts.
 * Joked about in Have I Got News for You, where a guest complains about David Miliband that "he just can't get used to these metric politicians".
 * Femto, of Berserk.

Tropes

 * Mega Neko
 * Mega City
 * Mega Corp
 * Mega Crossover
 * Megaton Punch