Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
I'm up at the Celadon Gym, and every time my Eevee levels up while battling, the game will reset when I finish the battle. I tried rare candy too. Same thing. So basically if Eevee levels up in any way, the game will reset. It doesn't happen with any other Pokemon. Wonder what's up with that...