DS

Drawn to Life: The Next ChapterUnlock three hidden music tracks11/24/09

Game Boy

AnimaniacsDebug Cheats08/13/12

Genesis

Dragon's FuryStart game as normally, but with 7 balls03/21/03
Phantasy Star IINo random encounters02/27/04

Wii

Sega Superstars TennisUnlockables in Superstars Mode03/20/08