Would you worry about someone who knows enough about domes and religion to paint the Sistine Chapel? No. So why worry about the mind that created this?
Stephanie's taunt is her saying "How Rude!" That's also her special move and her win pose. Stephanie was a one-joke embarrassment even by Full House standards.
I don't think anybody liked Stephanie, not even diehard fans... except, you know, maybe 'certain people' during the last season, if you know what I mean...
Not shown: every few rounds you get a Very Special Fight where your opponent has become a raging alcoholic or something and you have to cure them by punching them.
There's Story Mode where Stephanie develops a bad habit of lying so you have to beat her up to teach her about honesty. Then Uncle Jessie says something to Joey that makes him cry and you must slap him around to make him man up, while being careful to dodge the deadly notes from the touching background music. In the final round, Michelle fuses with her evil clone and becomes Super Michelle, and you have to stop her before her sickeningly cute one-liners destroy the fabric of time and space.
hopefully if uncle joey won his finisher move would involve using that godawful beaver puppet to gnaw away his oppenent's eyes after which says 'cut it out' and exits humorously