Obtain Pokeball before facing Rival
Start a new game and enter this code: CE2CCCB25D8D815D (walk through walls). After you deal with the situation with setting the clock, bypass Professor Birch by sticking to the far left and go through the trees. Continue until you get to Oldale and go left. Bypass all the trainers and this lunatic who thinks he sees a footprint created by a rare Pokemon and continue all the way to Petalburg. There is a Pokeball next to the right entrance of Petalberg Woods. Pick it up and if you want, you can head for the Safari Zone and get Natu. You need a Pokeblock Case from Slateport Contest Hall first.
If you need more help, we've got more Pokemon Sapphire cheats and also check out all of the answers for this game
Comments for this Game Shark Code