Now this is a character that's deserving to be the seventh Mario character.

I have an even better idea. Replace every Mario character with Waluigi. I mean, who needs Mario, Bowser and that green loser when you have Waluigi?

Hell, make it the Waluigi universe instead. In fact, cut everyone and make Waluigi the only playable character: We don't need anyone but him (except for Dedede, he's pretty cool).