I intentionally didn't link to Parts 2 or 3, kind of downplaying it, because I didn't want people to think "screw Mario, I want to play as Olimario (Olimar + Mario)!" and then lamenting that the game's not as cool anymore because they don't have the thing that made those hacks possible (someone suggested that it could damage your game and Wii if you tried the hack). Yes, creepy Peach with claws should be the end boss for Smash Bros. 4 (or make a cameo in The Grudge 3... trust me, one day that film will exist). But don't get your hopes up because the characters aren't supposed to look that way.
I'm amazed that Lucario + Mario looks near-flawless though.