Superboss

A Superboss in a video game is an optional (sometimes hidden) major enemy of extreme difficulty and immense power, usually more powerful than the final boss itself and also usually found near the end of a video game. They exist to give the player an extra challenge and potentially can offer great rewards for their defeat, although it is mostly for bragging rights (and in later iterations and re-releases of certain video games, for achievements). The Final Fantasy series series traditionally does not offer any significant form of reward that is of any use to the player in the game for beating a superboss, but that isn't always the case. Superbosses, because they are optional, may require a completion of side quests and/or completion of a hidden or optional dungeon before they become available.

Notable Superbosses

 * Kurt Zisa, Phantom and Sephiroth in Kingdom Hearts
 * Warmech in Final Fantasy
 * Shinryuu and Omega in Final Fantasy V
 * Neo Shinryuu, Omega MK.II and Enuo in Final Fantasy V Advance
 * Kaiser Dragon and Omega Weapon Final Fantasy VI Advance
 * Emerald WEAPON and Ruby WEAPON in Final Fantasy VII (Europe & North America) and Final Fantasy VII International (Japan)
 * Dream Devourer in Chrono Trigger
 * Omega Weapon and Ultima Weapon in Final Fantasy VIII
 * Ozma in Final Fantasy IX
 * Nemesis, Ultima Weapon, Omega Weapon and Penance in Final Fantasy X (Europe & North America) and Final Fantasy X International (Japan)
 * Yiazmat and Omega in Final Fantasy XII
 * Deadbeard in Golden Sun
 * Dullahan, Star Magician, Valukar and Sentinel in Golden Sun: The Lost Age
 * Culex in Super Mario RPG
 * Anti-Guy Squad in Paper Mario
 * Bonetail in Paper Mario: The Thousand-Year Door