Successfully complete the game to unlock the following bonuses. Parody mode replaces the original text with joke dialogue. Note: This is only available in the Japanese version.

Read the email from Bandai after completing the game for the Mummy Ship location. Go there to fight another Boss. Data drain the Boss to get a rare weapon for Kite.

Check the BBS to find the final Goblin location. Go there to fight and defeat the Goblin. Wear all the other Goblin items and you will be able to summon a Yellow Goblin in battle.