Bulbasaur is Pokédex number 001 in the original Pokémon games. It is the first entry in the National Pokédex and one of the three Pokémon offered to players at the beginning of Pokémon Red, Green, Blue, and their later versions.
Bulbasaur is a dual-type Grass/Poison Pokémon. Its design combines a small, quadrupedal creature with a plant bulb growing on its back. According to its Pokédex descriptions, the bulb grows as Bulbasaur develops and stores energy for evolution and survival.
Bulbasaur evolves into Ivysaur at level 16 and then into Venusaur at level 32. The other original starter Pokémon are Charmander, listed as number 004, and Squirtle, listed as number 007. This makes Bulbasaur the first entry among the three Kanto starter choices, not merely the first Grass-type Pokémon in the Pokédex.