In no particular order:
Villager: Oh look, a child with an endless supply of gardening tools
Mega Man: SUPER FIGHTING ROBOT! MEGAMAN!
Little Mac: Hey, it's shittle Joe or whatever.
Rosalina and Luma: Could you stop being in everything now?
Palutena: Err....Ass? ORIGINAL STATEMENT HERE.
Shulk: I've got a good feeling about this!
Dark pit: Pit in a Halloween costume?
Doc. : Melee fanboy/girl swarm?
DHD:-Insert laugh rage here-
Bowser Junior: Eww.
Greninja: MOOTOO?!
Robin: A fire emblem character not reliant on a sword? GG
Lucina: .-. I didn't ask for this..
Mii's: I definitely didn't ask for this. Nor did I want this.
Pacman: Waka Waka? More like...Err...Baka Baka! -ba dum tssh-
Wii Fit: The troll is real.