OutRagious!
More of a straight-laced action film than the previous goofy fight with Wario (I loved the ? block in his stomach, great touch!). For an ending, I'd say Toad and Nemetoad should have it out, until Toad appears to be winning, then Nemetoad uses the same blood-power he used on Toad to ressurect all the defeated Mario characters Toad -thought- he killed, then have them attack Toad. Perhaps Toad finds a way to free them all from the curse, and they all kill Nemetoad, then shake hands and agree to kill each other all over again another day. Perhaps the exact style in which Toad killed them imbues each of the zombies with power (ie, Wario could regurgitate a giant vine, Yoshi could cough up body organs, Luigi could vomit out a column of light that obliterates the Moon, etc). Hell, I don't know, I just hope Nintendo doesn't sue you over this, it's great :)