no offence, but that theory is ridiculous... while cool, it's ridiculous; and I have no idea how you developed such a theory...
nice moveset, by the way. I like the idea of Silver Wind as a Final Smash.
Boy, was this a delayed reaction on my part.
My theory is that the Pokémon Trainer could have some of the other Pokémon be replacements for Squirtle, Ivysaur, and Charizard. It's based off the premise that being a Trainer, your goal is you Gotta Catch 'Em All! While it may be a bit much to have more characters/Pokémon as Trainer characters, it's a nice way to get a lot of eligible Pokémon.
You could choose your roster, and even save it on names and Wiimotes. You'll have to unlock several new ones, small ones to replace Squirtle (Machop, Sneasel, Treecko, Parichisu), medium ones to replace Ivysaur (Scizor, Heracross, Grovyle, Gengar), and large ones to replace Charizard (Flygon, Typholosion, Infernape, Dragonite).
Scizor, one way or another, would be an excellent PC. His fanbase is huge (check out deviant art), his concept feels like a ninja or samurai, and he seriously could pwninate the opposition!