Ash becoming a Pokemon Breeder is a highly questionable notion and there are honestly a few things wrong with Ash being a Breeder, namely that he really isn't fit to become one in the first place. First of all, he hasn't expressed a good ability to effectively make Pokemon food at all. While he makes good friends with the Pokemon he owns, he can't really take care of them effectively: Brock, Cilan, and Clemont always feed the Pokemon for him. Secondly is that well...Ash still actively battles, gets Badges, and competes in Leagues. Breeders are pretty passive (ahem Reggie and Brock), and don't battle that much (though they do sometimes). He trains to battle, more than for health and friendship. And that brings me to another point: Ash doesn't really have the skills to handle Pokemon health. These are all subjective points of view from me, but if I'm going to be honest about Ash being a Breeder...it's questionable and something I cannot see being the case.