Pretty sure it's not THAT big of a deal.

[Rose Monkey]

Seeing as how it's an item and all, buuuuut

http://youtube.com/watch?v=NoF97-3C-Rc

:17

Pikachu Footstools Metaknight when he has invincibility from the star.

Wonder what else you can footstool people out of...

 

[Terywj [태리]]

Hmm...very interesting...
Perhaps you really can footstool opponents during Star or Pika footstooled Meta right before the Star activated...but I think that's unlikely.