Re: Pokemon: Spolier Chit-Chat
From what I heard, Ash can use Grovyle in battle much because Ash learned how content it was. It also has the will in it to win every battle it can, and that's the kind of pokemon Ash needs.
According to my theories, the episode title: "Petalburg Gym Battle! Five Gym Badges!", rumors has it that Taillow will evolve once defeating Norman's Slaking. Plus, there are rumors that Ash will decide in that episode whether or not Ash will evolve Pikachu with a Thunderstone. He decides this AGAIN, but Pikachu decides by itself........
These are ONLY rumors, they are not 100% sure.