>>45712321> the only grass type is shroomishYou can catch Budew, Seedot, Panpour, Oddish, and Pansage before you hit Pewter City.
>there are no useful pokemon around that point in the gameI beat him with a team of 4 mono normals with no SE moves. Broaden your mind and use a new strategy if the one you're using currently isn't working. You have to think in this game, few fights can you just unga bunga unless you're using some busted cheese strat.