Mecha-Grunty is a robot created by Klungo after Gruntilda was trapped under a boulder. She only appears in Banjo-Kazooie Grunty's Revenge. Gruntilda's soul was transported to the Mecha-Grunty while her body stays underneath the boulder.
After She is defeated, her soul returns to her regular body, being trapped under the boulder once more.
Is able to project a forcefield
Able to shoot electric bolts and homing bolts at enemies
Can fly for a limited time
Has powerful armor
Has great strength
Can cast illusions and shoot magic bolts at enemies