This Pokémon was created when a mixture of domestic and industrial waste underwent a chemical reaction of some sort. Trubbish emits noxious, burp-like gases which, when inhaled, will render the victim bedridden for a week. This gas can also prove fatal when inhaled by young Pokémon and children. As evidenced in the anime, Trubbish's ear-like tufts stand straight up when startled, are lifted if happy, and lowered if it is feeling down. Furthermore, in the same episode, it is also explained that once Trubbish befriends a person, it will cease expelling foul odors. It prefers unsanitary places, such as garbage dumps, where it finds trash and other rotten stuff such as moldy apples for food. Alolan Grimer is a common enemy of Trubbish, and Alolan Muk preys on it. Galarian Weezing feed on the fumes produced by Trubbish.