My current coof-dex team, about to take on team rocket at goldenrod

Pitayrant L45 grass/flying
Generopsis L47 bug/fire
Eyecho L44 psychic/fighting
Snoverdose L52 Ice/Poison
Grubbeast L45 bug/dark

4 of my mons are weak to rock. I get absolutely wrecked by stab accelerock.
3 are weak to fire and I get destroyed by fire mons.
This is the greatest romhack ever but building a terrible team feels quite easy.

What should I change up? I wanna keep Grubbeast and Snoverdose since I've had those the entire game almost.