Spikeball

Spikeballs are obstacles in the Bloo Kid series.

Description
Spikeballs are circle-shaped objects with spikes protruding on their surfaces. Bloo Kid can't destroy those obstacles by any means (unless he is overheated). They usually appear in castle levels.

Bouncin' Spikeballs
The first variant introduced. They simply bounce around mindlessly along the stage, hurting Bloo Kid on contact.

Wallclimbin' Spikeballs
They are similar to the previous variant except they have red, evil eyes. They can crawl on the walls/ceilings, like the previous variant, they hurt Bloo Kid on contact.