Needlous is a small little larva-like enemy with yellow and dark brown (black in artworks) stripes running along its small, slug-like body. Its body has eight sharp pointy spikes along its back making it somewhat resemble a hedgehog. It has small, beady black eyes. When curled up to a ball, four of its spikes will be present.
In Kirby: Nightmare in Dream Land, Needlous essentially replaces Togezo from Kirby's Adventure. Togezo shared similar properties to Needlous. On a regular basis, they move around slowly, but they will occasionally curl up in a ball and roll vigorously at an amazing speed when approached.
Needlous appears in Kirby's Return to Dream Land, where its black stripes are now more of a brown color. Needlous also appears in the New Challenge Stages in Kirby's Dream Collection Special Edition as well. It appears in the Smash Combat Chamber and Magolor Race EX.
Needlouses return in Kirby and the Forgotten Land, retaining their behaviour from the 2D games. However, a Needlous that strikes a wall mid-roll will bounce off the wall and change direction.
Needlous's name is a portmanteau of "needle," referencing its spiky body; and "louse," referencing its appearance. Alternatively, the name's ending may simply be the -ous suffix that is used to change a noun to an adjective describing something that possesses that noun.
- Needlous's yellow and black coloring makes it resemble a bee. This fits in with the needle theme, as bees have pointy stingers. However, Needlous was most likely based on the Lophocampa maculata species, commonly known as the Spotted Tussock Moth Caterpillar.
- Togezo and Needlous's tactic of rolling around as a spiky ball later appears as one of Needle Kirby's moves in Kirby's Return to Dream Land.