Boom Primid
The Boom Primid, presumably short for "Boomerang Primid," is a type of Primid that appears in The Subspace Emissary story of Super Smash Bros. Brawl. It wields a yellow, blade-like weapon that functions as both a sword and a boomerang. A Boom Primid will regularly throw its boomerang, which can be reflected back at it to do damage.
Trophy description
A Primid with a boomerang--hence the name. This Primid will use the boomerang to attack from afar (which is pretty much what you'd expect) and adds to its arsenal with close-quarter combat strikes. These two attack patterns may lead you to believe that it has no fun with boomerangs, but no! Boom Primids are just a little on the shy side.
In Adventures 4 boom primids appear as enemies in shadow ridge. They have 124 hp.