Super Smash Bros. Brawl/Squirtle
In a nutshell
Squirtle has been considered by many PT players as the best Pokemon in PT's arsenal. Squirtle has an amazing air game. His quick aerials give him very good spacing. On the ground, Squirtle has a wierd turnaround animation, which allows him a short slide after the animation. Squirtle also has amazingly fast ground attacks and decent smashes. It isn't hard to see why Squirtle is a very useful character. Do consider practising him the most if you play Pokemon Trainer.