Bubble Bobble DS Cheats (Nintendo DS)

Defeat the Classic version Boss using two players. Then, press Left, R, Left, Select,
Left, L, Left, Select at the title screen in the Classic version.

Complete all 100 New version levels to unlock Robolun.

At the title screen in the Classic version, press Select, R, L, Left, Right, R, Select,
Right.

At the title screen in the Classic version, press L, R, L, R, L, R, Right, Select. Touch
the door that now appears in level 20 to start the bonus rounds.

Complete all 100 New version levels with Robolun to unlock Lovelun.

Collect nine letters throughout the game. You must kill at least four enemies with a
single Super Bubble, then collect the key that they drop. After defeating the Boss of
that group of levels, it will drop a letter instead of the big gem. You must collect a
letter from every Boss in the game (nine total) to unlock the final ten levels.