The legendary trainer
legendary trainer
But if it is a grass/dark then the water one could be water/fighting and the fire one could be fire/psychic so they can counter each other pe rfectly giving none of the rivals any advantage.
That's why you catch other Pokemon..... However, I can imagine the fire type being poison also, the water also being ice, and we will have to see the grass's evolve form to judge weather or not he has another type or not but as of right now he looks pure grass. But the rival will always have a counter for your starter, and as I have stated before you catch other Pokemon to re-counter his.