What do you mean by starter pokemon? If so, choose Samurott. There are a lot of better grass and fire typed in the game. Samurott also isn't badly harmed by grass due to it also being a fighting type. You can also pick Emboar, since it's very useful up to the champion. It gets hard to use during the after game.
If you need any help with pokemon, ask me! I'm a expert p_p