RaptorRuler, take a Venipede and name it Centi. It must have the ability Poison Point.
This tiny bug-type loves to spread poison among enemy ranks.
It must learn and keep three Poison-type moves ASAP.
To evolve to Whirlipede, it must poison fifteen trainer-owned Pokémon.
To evolve to Scolipede, it must poison two Pokémon belonging to gym leaders.
IF it evolves to Scolipede, it can only attack foes who are poisoned.
It must solo one trainer in every gym except one. (Your choice, I recommend avoiding Skyla's gym)
It must solo two Pokémon in the elite four.