Game Boy Color

Mega Man Xtreme 2Unlock Haduken and Shoryuken attacks06/21/05

GameCube

Baten Kaitos: Eternal Wings and the Lost OceanUnlock songs 53-58 in Sound Test07/08/05
Mega Man Anniversary CollectionMisc. Unlockables06/24/04

iOS (iPhone/iPad)

jukebeatKonami jingle04/09/12

NES

The Guardian LegendGet to point (25,0)08/09/03

PlayStation

Legend of LegaiaGet the ''Honey'' item.06/20/05
Legend of LegaiaSecret Boss Fight with Lapis06/20/05

PlayStation 2

Dance Dance Revolution SuperNOVA 2Unlock Character10/02/07
Dance Dance Revolution SuperNOVA 2Unlock Doubles Mode in Hyper Master Mode09/28/07
Dance Dance Revolution SuperNOVA 2Unlock Hidden Areas09/28/07