Re: You're Using THAT Pokemon?
I don't think in terms of competitive battling or stats, I just choose my favourite Pokémon or ones I find pretty. I started Pokémon with the Sinnoh region, so I used Floatzel or Gastrodon (depending on which version), also I used Lopunny a lot. I also like Carnivine, but nobody seems to like him :( Finally, and I'm not even sure if this counts, I use Abomasnow frequently.
I use my favourite Pokémon, or ones I think are cool. Once I've finished the game, that's when I start going for Pokémon with good stats or something of the sort.