Poptank (ニシータ Nishita?) is an enemy that appears in Knuckles' Chaotix. It is a mass-produced, hermit crab-based Badnik model created by Dr. Robotnik.
The Poptanks slightly resemble hermit crabs.
The Poptanks only appear in Marina Madness. In gameplay, they lack any kind of offensive capability, and simply trundles back and forth on the ground, or sometimes upside-down on the ceiling.
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