Some trivia for those who haven't noticed this.

Notes:

According to some article I read (can't be bothered finding it), characters have less bones on their models in 8-Player Smash, so you may notice a bit more clipping with certain things if paused or when looking closely at certain parts on a character's victory pose.

The article also mentioned this as a possible additional reason why Ice Climbers aren't in the game. It's not a fact, of course.