first, you save the game before you pick your first pokemon. Then do the errand and wen you get the pokeballs go and catch a pokemon,then deposit your starter in bills pc then switch boxes and wen it says "saving......" switch of your gameboy then turn it on agen and you will be at the table where you pick your starter, they will all be there, then pick one you havent already got and repeat this for all pokemon then go and withdraw them all out of the pc !!!! simple :S