Venusaur, the Seed Pokémon. Venusaur uses its large petals to capture sunlight and transform it into energy.
– Ash’s Pokedex
Venusaur! The original fully evolved Grass starter. Despite there being many Grass/Poison types, Venusaur is actually the only Grass/Poison starter. It’s the first fully evolved Pokemon in National Dex order.
In the anime, Ash never had a Venusaur, because his Bulbasaur didn’t want to, so Ash didn’t allow it (Ash is kinda dumb imo not letting his Pokemon evolve). May’s Bulbasaur evolved into a Venusaur though, but not on screen; we saw her Venusaur when she came back in the DP arc.
Stat-wise, Venusaur’s pretty bulky. It’s got good Sp Attack as well. Its Speed is decent, and can be good with a good nature and EVs.