i think the way the story of ash is set up is actually quite clever. now i cannot really comment because i only have seen season I II & III back to back. but from memory. he must be.. 12..? 13..? maybe older. but i think that the creators are playing at this. that way. for example, in 5 years or so. when he's 17-18 he will start to get better at he's pokemon collecting. and actually get more serious about the whole idea of being a pokemon master. but back on topic. (haha) i don't think he will ever have a eevee.. which is kind of disappointing.