@ Washy:
on Squirtle: Squirtle is a unique hit and run type character. He can (and is recommended) combo, but he has a play style similar to Sonic and Jigglypuff, get as many hits in as possible, then run far enough so that they can't hit you back, and repeat. Squirtle isn't that good at it.
On Ivysaur: When I said purely defensive, I mean purely defensive in the tense of a fighting game, which is, as defensive as humanly possible with attacks. He is a camper, no questions. Does he have offensive capabilities, of course, otherwise he'd be harder, but he plays a defensive style game, which means fatigue doesn't hurt as much.
On Charizard: Yeah, I want to live in that dream too, but in full reality, I know that, as good as Charizard is, he isn't a Marth or Snake. He is unlikely to be high or god tier on his own, and holding up a team with a rather pathetic turtle and a purely defensive Frog thing ain't helping much either.