This Bullet Bill is a Killer! An official, limited availability Super Mario Plush, the missile-like enemy measures about 12.5cm / 5-inches long in snuggly soft form.
Bullet Bills, known as “Killers” in Japan, are black, missile-like enemies, commonly depicted as having small arms and fanged frowns on their faces. They first appeared in Super Mario Bros. and are usually fired by cannons known as Bill Blasters, although they're sometimes fired from other sources, such as Snifits and generic cannons.