Wario de Mambo rocks face. I'm sure the only way anyone could dislike it would be if they were total nubs in WarioWare who have crushingly embarrassing memories of losing the game again and again and again. That, or they are closed-minded losers who can't accept any kind of change and won't even play WarioWare; you know, the same kind of people who insist on playing as Overalls Wario, with the look that altogether makes him look more angry than crazy.
But I side with ShadowBrain, who surely isn't one of these people, in thinking that it's much too intense for Super Smash Bros. Good call.