Bomberman Cheats for the PSP

Blow Me Out level:
Beat all ten planets on normal difficulty to unlock this level in Battle mode.

Pipes and Belts level:
Beat classic mode to unlock this level.

Classic Mode:
Beat all ten planets on normal difficulty to unlock the classic version of the game with updated graphics.

Searchlights Battle Stage:
Complete Levels 10-5 (make sure you get the key) and you will unlock this level.