Bristles

Bristles are porcupine enemies exclusive to Donkey Kong Country 3: Dixie Kong's Double Trouble! and Donkey Kong Land III. Bristles act as a replacement for Spinies from the previous game, Donkey Kong Country 2: Diddy's Kong Quest.

Summary
Bristles have the pointy quills Spinies have on their back like them, preventing aerial and back attacks. Though, unlike the Spinies, the Bristles can actually avoid their frontal weakness.

Bristles attacks simply with its sharp quills on its back. While it only walks back and forth like most regular land enemies do, it also can injure Dixie and Kiddy when attempted to be jumped on or rolled from behind.

When attacking in the later levels of Donkey Kong Country 3, Bristles can curl into a ball, and by doing this, its whole body cannot be touched. Dixie and Kiddy then have to wait until Bristles curls back to normal so they can defeat Bristles in the front by rolling or by a barrel.