Have you seen how much Charizard has improved since it's been at that training facility? Wow. No wonder Ash has kept it there so long, and continues to do so.
Well apparently Ash does love his grass starters. I think Naetoru is perfect for Ash, it's got all the guts of Bulbasaur and all the power Treeko had. I look forward to seeing what it'll manage to do in the future.