I don't really think any Wario-related characters (other than Wario himself, duh) have a chance at being anything more than Assist Trophies. These are the sort of characters people would like in Brawl because they're cool as characters, even if not exactly good as fighters. Since the Assist Trophies are basically for these types of characters IMO, they don't need to be playable. Of course, I could be wrong.
Anyway, this is an Assist Trophy I've invented for Jimmy T./P. (whoever's the original with the blue wig). As soon as he's released from the trophy, he puts himself in the middle of the stage, and the stage becomes completely black except for a disco ball and colorful lights, Jimmy himself (a limelight glowing on him), and the player who summoned him (a limelight following him/her). Jimmy dances for a little while, and in that time all the other players can't see where they're at (neither can they see platforms, edges, and holes, and this applies for whoever summoned him too). Then Jimmy leaves and the stage goes back to normal. Of course, this would only last several seconds, but it'd be cool, wouldn't it?