The Advantage

A band from California that makes covers of songs off of old NES games such as Metroid, MegaMan, Castlevania, Bubble Bobble and many more.

Check out their awesome cover of MegaMan 2 Flashman:

I'm not having much luck finding anywhere to download their albums or EP's from, although they do have a few songs on their MySpace, and a quick YouTube search will find you some of their songs too.