The title of Pokémon Master encompasses all aspects of Pokémon training, which I would assume includes contests as well. Maybe Ash wants to expand his horizons and better himself.
Doesn't Brock have a ribbon case too? Or did he just get a contest pass? *gasp* Maybe they will forego the gyms and DO ONLY CONTESTS?!?! :O
I don't think Ash will participate in too many contests, and if he does, he's gonna lose, whether it be to Hikari or any other shmuck there. You know Hikari's going to win enough contests to make it to the Super Duper Pokémon League of Contests (whatever they're called), and if Ash is getting in her way (and winning), there will be a lot of contest episodes... >_<
Ash beats Gyms, Hikari owns contests. Brock has been along for the ride since day one and needs to go. Yes I realize he hasn't been with Ash constantly... he was brought back for Hoenn, let someone else come along. Invent a new character. Bring Tracey back. Anyone -_- [/rant]