Pheromosa is an Ultra Beast mostly resembling an anthropomorphic, feminine cockroach. It has a thin build and is mostly white. It has a segmented body, having 5 segments dividing its torso. Pheromosa has a long and narrow neck, and a small semicircular face. It has narrow white eyes with a purple iris, and blue pupils. Pheromosa has long, thin legs suited for running and kicking, with golden pads at the joints. Its feet consist of two twig-like structures, rather resembling high-heeled shoes.
Pheromosa's lithe, elegant body is capable of sudden feats of acceleration, able to twitch its limbs at an estimated 120 mph (200 km/h) instantaneously, a speed previously unseen in the world. It also produces a sort of disarming pheromone which was described as "previously unknown to science" that causes those nearby to become awestruck by its presence. It displays a considerable reluctance towards touching anything, as if it interprets the Pokémon world as being unclean somehow.
Origin
Pheromosa may be based on an American cockroach that has molted, which causes it to be white in color. It may also draw inspiration from a copepod.
Name origin
Pheromosa may be a combination of pheromone and hermosa (Spanish for beautiful) or formosa (Italian for shapely; Portuguese for beautiful).
Ferōche may be a combination of pheromone, feroce (Italian for fierce), and cockroach.