No doubt about it, this is a classic.
Bulbasaur was a strong, confident Pokemon (with a touch of arrogance), yet he was caring and capable of resolving conflicts in a matter of seconds. Heck, we've even got Pokemon mimicking him to this day (read: Turtwig). And Melanie, she was great too. An awesome companion for Bulbasaur, who created perfect harmony between him and Ash.
Glad to see him as part of Ash's team. Bulba-saur!