S9E43 : Pace - The Final Frontier!

With Charizard out of the battle for his rematch against Pyramid King Brandon, Ash calls out Bulbasaur. Dusclops performs Mean Look again, while Bulbasaur wraps the Ghost-type with Leech Seed. The two Pokémon are evenly matched, but Bulbasaur takes a beating from the Fire-type move Will-O-Wisp and is affected by Confuse Ray, which causes it to use Vine Whip on itself. Because Leech Seed is taking energy from Dusclops and giving it to Bulbasaur, the Grass-type manages to stay in the fight, using SolarBeam to knock Dusclops out.