Get All Three Starting Pokemon:

Wait until you can buy a Pokeball and catch at least one Pokemon. Trade with a friend at the Pokecenter. Make sure that your friend has a Pokemon to give away. Trade the Pokemon you selected in the start of the game, then start the game again. Continue this process until you have all three (Torchic, Treecko, and Mudkip). Make sure that when you trade to your friend, he has kept the Pokemon you have given him or her. When you have chosen the last starting Pokemon, catch two Pokemon. Trade with your friend again to get back the two other starting Pokemon you previously gave him. You should now have Torchic Mudkip and Treecko.