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Bulbasaur is a small, quadruped Pokémon with green or bluish green skin and dark patches. Its thick legs each end with three sharp claws. Its eyes have red irises, while the sclera and pupils are white. Bulbasaur has a pair of small, pointed teeth visible when its mouth is open. It has a bulb on its back, grown from a seed planted there at birth. The bulb provides it with energy through photosynthesis as well as from the nutrient-rich seeds contained within.
As mentioned in the anime, starter Pokémon are raised by Breeders to be distributed to new Trainers. Having been domesticated from birth, Bulbasaur is regarded as both a rare and well-behaved Pokémon. It has been shown to be extremely loyal even after long-term abandonment. Bulbasaur has also shown itself to be an excellent caretaker, even having a special technique called the "Bulba-by." To perform this technique, Bulbasaur uses its vines to pick up a young Pokémon and soothingly rocks the young one in the air.
It is found in grasslands and forests throughout the Kanto region. However, due to Bulbasaur's status as starter Pokémon, it is hard to come by in the wild and generally found under the ownership of a Trainer. It is shown that a Bulbasaur's bulb will flash blue when it is ready to evolve. If it does not want to evolve, it must struggle to resist the transformation. Many Bulbasaur gather every year in a hidden garden in Kanto to become Ivysaur in a ceremony led by a Venusaur.