This section temporarily contains information copied directly from Bulbapedia, and needs to be rewritten so not to be classified as plagiarism.
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. 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. When it is in danger, the odor worsens, but it will not emit its odor if it feels safe. Gloom lives in grassy plains.