The most obvious for me is EP200, Turning Over A New Bayleef.
I just wanted to smack Ash to the death in this episode. In EP199, He was attacked by TR while trying to save his Chikorita and Chikorita evolved into Bayleef just to do vice versa. In EP200, Ash was the exact opposite of himself in EP199. He was just a jerk. If he wasn't teamed up with Totodile at the end of the yelling scene, I could understand him a little bit. He didn't even notice his Bayleef's absence. Misty did. But it was the worst Ash by far I've ever seen. Also making Bayleef apologize at the end of the episode? What was that? Was Bayleef the one whom should apologize for its actions?
Also this was the episode I started to like Bayleef a little bit lesser. I thought she should have attacked to Beedrill instead of running away from them. She was done with wild battling. Before this, she never cared about being a disadvantaged-type or being outnumbered.