This article or section contains information derived from Co-op Missions, and should not be considered part of the official StarCraft storyline.
Stetmann deployed them during the End War against Amon. These zerglings can utilize egonergy to give themselves a hardened shield, protecting them from attacks, and to increase their attack speed via synthetic pumps. Mecha zerglings can be upgraded with wings to increase their movement speed.
The mecha zergling is the basic unit for Egon Stetmann in Co-op Missions. They serve as traditional zerglings, and have similar upgrades to its speed and attack speed. The mecha zergling can use egonergy to power a hardened shield that lowers the damage of attacks done to the zergling to 10.
Mecha zerglings can be "recycled" when they die, which will respawn additional zerglings. At level 13, mecha zerglings provide double recyclable material.