somewhere in the advanced challenge season
grass hysteria
Bulbasaur wanted to go with him.
May's Bulbasaur did not evolve in an episode, it evolved while she was competing in Pokémon Contests in the Johto region which were not shown in any episodes.
Bulbasaur and the Hidden Village in Episode 10 in the Indigo League
Bulbasaur is a starter for the Johto Region, so you cant catch him in the Sinnoh.
In Pokémon AshGray, you can catch a second Bulbasaur by visiting the area where you first encountered the original Bulbasaur. After you have progressed through the game and obtained the necessary badges, return to the forest where Bulbasaur is found. You may need to trigger specific events or interactions to encounter another Bulbasaur. Make sure to have enough Poké Balls or other capturing items ready to catch it when you find it.
You cannot catch a Bulbasaur in the wild. You must defeat Red on top of Mt. Silver. Then, you can go to Professor Oak and choose the bulbasaur.
you can't
you do not catch it . you can bulbasaur when you get it from proff oak
You cannot catch bulbasaur in diamond and pearl. If you have firered or leafgreen can set 6 Pokemon free in pal park and catch them there.
The episode in which Ash brings his Bulbasaur over to the Hoenn region for the first time is called "Hokey Poké Balls."
You can't, Bulbasaur is unobtainable. You have to trade, hack, cheat or get it from mystery gift.