I love you all to death (Just so I can smash bros with you) (SSBWiiU/3DS)

[Gwen]

It'd be a long stretch, and she probably wouldn't because it's an M rated game, but it'd be cool if Bayonetta got in,

So was Metal Gear Solid.

There's still a difference between them, and that would be each character's behavior. Bayonetta's just probably wouldn't fit in with a game like this if they're keeping it Teen rated stuff at most unfortunately.