If you meant to rename a Pokémon (or simply 'Where is the name rater?'):If you want to rename your Pokémon, go to Castelia City. The street connected to Route 4 in the uppermost part of Castelia...
It's unlikely, but the games will erase if the gameplay time goes above 999:99 have you been using any codes that put your time up there, and you didnt use them? If so, delete the code. If not, i...
In the start menu (the menu where you select your game to start playing) you select "new game" and after wards, save that new game and it will replace your old game