It scatters spores from holes in the cap on its head. It loves warm and humid climates. It feeds on trees and plants in fields and forests.
(From Bulbapedia) Breloom is a bipedal, mushroom-like Pokémon with some kangaroo-like qualities. Most of its body is green, but its head to its neck and its tail are beige. On top of its head is a green, mushroom-like cap with beige gills underneath and a round, red berry-like growth with a hole in the middle on either side. It has oval, black eyes, a beak-like mouth, and frilled segments around the base of its neck. There are two red claws on each of its hands and feet. At the end of its tail, there are seed clusters made of hardened toxic spores that are horrible to eat.
Breloom can stretch its short arms to deliver fast punches. Additionally, it has light, springy footwork that allows it to get close to opponents. Another way it closes in on opponents is by incapacitating them with spores released from the holes in its cap. Its technique is equal to that of professional boxers. It prefers to live in warm and humid forests, where it feeds on trees and plants.
(From Bulbapedia) Breloom is based on a mushroom specifically the genus Agaricus and its body structure resembles that of a kangaroo. The shapes of its head and tail resemble that of the armored dinosaurs, Pachycephalosaurus and Ankylosaurus, respectively.
(From Bulbapedia) Breloom may be a combination of umbrella and mushroom. In Latin, bellum means war, perhaps a nod to its Fighting type.