Resembling cones, the Spikebonkers have an orange top cap with a black cylinder section below. Placed below their orange cap on their black underside are also two glaring eyes. On their bottom, they have a grey drill as well. They also carry an engine pack on their back and have a mace ball orbiting their lower section.
Spikebonkers appear only in Death Egg Zone, where they hover slowly from side-to-side with their mace orbiting them. When the player approaches, the Spikebonkers attack by sending their mace flying towards the playable character in a linear line. However, the mace has a limited range and will return to its Spikebonker like a boomerang. The Spikebonkers will repeat this pattern until they are destroyed or the player gets far enough away.
With the right timing, the player can defeat a Spikebonker with a Spin Jump. However, the player has to take notice of their mace's movements while attacking, as it can easily harm the player upon its return trip.
In other media
Sonic the Comic
Spikebonkers appeared as the Death Egg II's security system in Sonic the Comic. Sonic battled them when he infiltrated Level 19, Sector 2. He seemed very unimpressed with their design and particularly their ridiculous name. The Spikebonkers did eventually bring Sonic before Robotnik, but Sonic insisted that he hadn't been beaten and that they had merely helped him find Robotnik.