Pointdexter has a grey body with spikes around, a blue face and occiput with yellow borders. It swims around slowly, periodically drawing out and retracting its spikes, although it makes no effort to attack the player. It can easily be destroyed with a Spin Jump when its spikes are retracted, but it will damage the player when its spikes are out.
Pointdexter also appeared in several issues of the British publication Sonic the Comic, after Doctor Robotnik's discovery of Floating Island. In this continuity, they are able to float through the air, much like Bubbles from the Marble Garden Zone in Sonic 3. In their first appearance in the comic, Pointdexter appeared in this zone.
- In Sonic Advance, there is a Badnik named Senbon that has similarities to Pointdexter.
- In Sonic 3D Blast, a similar unnamed pufferfish enemy appears in Spring Stadium Zone and Gene Gadget Zone.
- Pointdexter is similar to Bubbles, a badnik from the same game due its appearance and attack method.