The Octostomp was an Octoweapon created during the Great Turf War by the Octarians. A plug was pulled and caused the Octostomp and the rest of the Octarian mechs to shut down. Nearly 100 years later, the Octostomp was brought back to life by the power of a Zapfish to attack once again.

The Octostomp is a robotic Octarian in the shape of a large cube with several layers on its face covered in dripping purple ink, with many elements appearing recycled from other sources.