This time it's awesome. Really.
It's Pokemon Trainer! He uses Squirtle, Ivysaur, and Charizard. You can switch them in and out, and they fight for you while you stand in the background and issue commands. They have stamina (HP), as well as a shared life bar. Seems like a really interesting game mechanic, and a really awesome treat for Pokemon fans.
Via: Smash Bros. DOJO!!
I REALLY hope this doesn't mean Jigglypuff is taken out. Mewtwo and Pichu, sure. But not the Puff.