I think I would want to be a Pokemon Breeder, possibly. I think I would also frequent the Wonder Trade and level up the Pokemon before trading them back. That way people would be more inclined to use them rather than just send them right back in Plus I would get a ton of PokeMiles and trade that in for stuff, which is cool.
My partner would probably have to be Talonflame, of course. He gets Flame Body and Fly, which is great for hatching eggs and traveling. Although to be fair, would you even be able to fly on a Talonflame? They're not terribly big, I don't think he could carry me, realistically... I'd have to think about that.
As for other Pokemon on my team, I probably wouldn't have a whole lot, maybe only one or two more. They would just be a few that I've been really close with and that I have deemed to be totally rad and whatever. <3