Ha, I loved Venonat, the way it ran circles around Ash & co. I also loved the boobytraps, like the glass panes and the collapsible wall. The best part was the trick room bit with Team Rocket. Awesome.
Bulbasaur was good against Aya, but I personally loved Charmander vs Golbat more. Ember was a neat move, but the battle was just too quick. Golbat fell too easily. I wish they would've had a seperate episode for it, but no matter. It was still fun to watch.