No way! The Pokemon Trainer has finally arrived. And it looks like he doesn't do his fighting directly.
Instead, he uses the three Pokemon with him, 'Squirtle, Ivysaur, and Charizard' to do the fighting for him. They swap out in a set order: Squirtle->Ivysaur->Charizard.
They all share the same damage meter, so they don't recover from damage during Pokemon Change. But they also have another stat, which you might call stamina. If you keep fighting with the same Pokemon, or if you change them out too often, it's not so good for the Pokemon. If you want to be a good Pokemon Trainer, you'll need to learn these kinds of ins and outs.
The Pokemon Trainer watches from the background. He needs to use his three Pokemon to fight. So the only ones who fight directly are the Pokemon. I guess you could say using this character is like playing three for the price of one! And the Pokemon Trainer uses a special move called Pokemon Change to switch between them.
Source:
http://www.smashbros.com/en_us/index.html