>>53917852>FireUnequivocally the best choice because early game is always full of bug/grass shitters, and fire types are generally rare and locked to at least the midgame.
>WaterUseful for beating rock/ground types in cave heavy regions. Otherwise not as good as fire, but still a solid pick. Like fire, good water types often aren't available until around the midgame, so it's nice to have one right at the start.
>GrassThe worst choice. Gets shit on by bug and flying types which are everywhere at the start, poison too depending on the region. Only thing it's good for is caves, but the water starter will probably be better at this since it can also deal with Zubats. Also grass types are a dime a dozen in the early game, you're not missing out on anything by choosing a different starter type.
tldr
fire > water >>> grASS
