Kirby: Planet Robobot screenshot
Volte is a large green robot. It has a wide head with one orange eye and a screw on top. The robot has short arms with clamps for hands. It moves around on treads.
Volte appears exclusively in Stage 3 of Patched Plains. Two Voltes attack before the battle with Gigavolt, presumably acting as minions for the giant robot. Volte approaches Kirby's Robobot Armor, charges its attack for a few seconds, and then rapidly spins its arms around its body. This attack damages Kirby if he touches it.
Kirby can defeat Volte by attacking it several times. Additionally, jumping atop the robot and removing the screw on its head defeats it instantly.
Upon the defeat of the two Voltes, Gigavolt appears and battles with Kirby.