Ultimate boss

An Ultimate Boss is an enemy character that is an extremely powerful, but optional, boss. In the Megami Tensei family of games, Ultimate Bosses are not just optional bosses, they are the absolute, strongest enemy in a game, often requiring amazing levels of power and extensive strategies to defeat. Ultimate Bosses are typically hidden and always in the end game, if not during second cycle. Some even require that several other optional bosses be defeated first in order to reach them.

Ultimate Boss Characters

 * Shin Megami Tensei: Beelzebub
 * Shin Megami Tensei II: YHVH (he is however the last boss)
 * Shin Megami Tensei III: Nocturne: Lucifer (True Demon Ending's last boss)
 * Shin Megami Tensei: Strange Journey: Demiurge (New Game + only)
 *  Digital Devil Saga: Avatar Tuner: Hito-Shura (2nd cycle only)
 * Digital Devil Saga: Avatar Tuner 2: Satan (Hard difficulty only)
 * Devil Summoner: Raidou Kuzunoha vs. The Soulless Army: Beelzebub
 * Devil Summoner 2: Raidou Kuzunoha vs. King Abaddon: Masakado (New Game + and neutral alignment)
 * Shin Megami Tensei: Devil Survivor: Lucifer (New Game + only, and except on Yuzu's route)
 * Persona 2: Eternal Punishment: Philemon (EX Dungeon only)
 * Persona 3 (FES): Elizabeth (2nd cycle only)
 * Persona 4: Izanami (True Ending Arc only), Margaret (2nd cycle only)