"There's also Bug Buzz. And Struggle Bu- wait, no, Esuna learned that from a TM. Bug Bi- move tutor, I'd forgotten. Let's see... String Shot and Rage Powder? Perhaps not Rage Powder, butterflies cannot take hits properly, but slower opponents are safer opponents."

Maybe he should just bring his Volcarona along, to be safe. And to set the cave on fire if needed.