Bayleef resembles a pale yellow sauropod dinosaur or a lizard. A large leaf shaped like a scythe protrudes from its head. Curled leaf-like growths, stated to be buds with small tree shoots inside, sprout in a ring around its neck. It has red eyes, a short, blunt snout, and a short, pointed tail. There is one large toenail on each of its four feet.
The aroma wafting from the leaf-like growths around its neck has a spicy scent, and exhibits various beneficial effects on itself, nearby people, or Pokémon who inhale it. The fragrance has a combination of energizing, stimulating, and healing effects. Bayleef can be rarely found in grasslands.
Ash's Chikorita evolved into Bayleef in Current Events. Bayleef still had the same personality it had when it was still a Chikorita, but it soon mellowed out.
Four Bayleef appeared in The Power of Us, with two under the ownership of two different Trainers (including an unnamed recurring woman), the third being wild, and the fourth appearing during a flashback.
Bayleef, the Leaf Pokémon. The evolved form of Chikorita. Bayleef emits a spicy aroma from the leaves around its neck and its Razor Leaf is extremely powerful.
In Lively Larvitar of Pokémon Adventures, Crystal's Chikorita, nicknamed Megaree, evolves into a Bayleef while defending his Trainer against an attack from an old foe, an impish wild Larvitar. He evolved with his fellow starter Pokémon in the fight against Lugia in the Whirl Islands.
In the Pokémon Gold & Silver: The Golden Boys manga
Bayleef is the tallest of the second-stage evolutions of starter Pokémon.
Bayleef's "necklace" is consistently described as having a spicy aroma, while real bay leaves have a bitter and herbal taste, which is similar to thyme.
Origin
Bayleef is based on a group of dinosaurs called sauropods, specifically the Apatosaurus. Its vegetable part is based on the leaves of the bay laurel, which oil is used for healing and as a stimulant in aromatherapy.