Attachment
Apocalypse has an unused attack where one of his hands turns into a energy weapon of sorts and creates an energy ball. The attack deals no damage, suggesting that it was unfinished.
Contributed by ZpaceJ0ck0
The Japanese version features pre-battle dialogue between Apocalypse and every single playable character. These intro dialogues were not translated and instead they were removed from the international versions of the game.
Contributed by ZpaceJ0ck0