Okay first you pick the starter you want to listen to you at the beginning of the game then save. Pick a new starter and go through the quest until you get a pokeball, catch a pokemon (any pokemon) then do a cloning trick with the new starter. Start a new game and repete. (on the second and third time dont save at all or this will mess it up) if you dont want to start over, this will work at any stage of the game.