Forgot the name of a game? Post here.

[Ragnar]

Hey does anyone know the name to a black & white plat-former where you transform from black to white and visa verse and the final boss is a rainbow guy which you have to destroy a green, red and blue diamond to activate? Also I believe the game's title starts with an a, I'm not to sure. It was one of my favorite games ever. Please tell me the name if you know. (Btw it's 2D)

Toggling between black and white makes me think Ikaruga, but that's not a platformer. I found a list of 'games like' it though, so maybe it'll pop up there?
http://www.giantbomb.com/ikaruga/303...similar-games/

The only platformer I really noticed on that list was the bit.trip stuff. But I don't really think that's it.