Yikes Spike
Not related with Wreck it Ralph.
Because they actually mixed a few:Probably because it's the most eye catching place to put it.
But seriously, the animation does look pretty nice. Indeed, the model in general looks quite a bit better than many early Wario models in actual Nintendo games...
http://steamcommunity.com/sharedfiles/filedetails/?id=105290081&searchtext=wario