Gloom

Gloom (Japanese: クサイハナ Kusaihana) is a dual-type Grass/Poison Pokémon introduced in Generation I. It evolves from Oddish at level 21 and evolves into either Vileplume when exposed to a Leaf Stone or Bellossom when exposed to a Sun Stone. Gloom is a blue, bipedal Rafflesia-like Pokémon with rudimentary hands and feet. On its head is a flower with spherical petals surrounded by four reddish-brown leaves. The petals are a dark reddish-brown and have white spots; a female Gloom displays a single large spot on each petal, while a male will have many smaller spots. Gloom's mouth is often agape, and it secretes a sticky nectar that can be used as a fertilizer. Both this nectar and the flower on Gloom's head release a foul odor, which can cause humans to faint from over a mile away, but some humans find it pleasing. The odor is a key ingredient for some perfumes. When in danger, the odor intensifies. Gloom is found in grassy plains, and its signature move in Generation I was Petal Dance.