Gloom (Japanese: クサイハナ Kusaihana) is a dual-type Grass/Poison Pokémon.
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 Pokémon with rudimentary hands and feet. It has orange leaves and a reddish-brown flower growing from its head. The flower has large, rounded petals and white spots, and the female displays fewer, but larger, spots. Its eyes are wide and narrow and its lips are thin and purple. It trickles sticky nectar from its mouth with the appearance and consistency of drool. This can be used as a fertilizer for plants. Both this nectar and the flower on Gloom's head release a foul odor strong enough to induce fainting in humans over a mile away. However, it can also attract prey, and even a very small number of humans find it pleasing. This odor is a key ingredient for perfume production. When it is in danger, the odor worsens, but it will not emit its odor if it feels safe. Gloom is very sleepy during the day and prefers shade. Sometimes it will fall asleep while standing up. Gloom's moves are clever and cute in the Contest Spectacular. Gloom lives in grassy plains.