Bayonetta is clearly a Malconvoker.
Or, since she maps much more closely here, a pathfinder witch with amateur gunsmithing feats (and a grit pool) and the prehensile hair Hex who is hiding like 8 Opalescent White Pyramid Ioun stones and using Shades the way god intended - to tear celestials to pieces.
Superman is an enlightened fist with Ocular Spell. Strength devotion too, probably. Kryptonite is very obviously generating an AMF.
Mario is Hood. I mean, he can kill the sun by jumping on it!
Bender is a warforged rogue.
Robot devil is a warforged bard with leadership.
Professor Farnesworth is a classic venerable aged artificer.
Merasmus (TF2 halloween) is not a "wizard" at all, he's a chumpy warlock. Which I guess explains the look.