Petaforth[1] is an enemy appearing in Mega Man 7. It is a larger and tougher version of the Peterchy robot, an eyeball with two plunger legs that rotate around it to walk.
In Mega Man 7, Petaforths appear in Freeze Man Stage, Weather Institute Stage, Burst Man's stage and Spring Man's stage. Similarly to the original Peterchy, they move by rotating their plunger-like legs around their own central axis in a wheeling motion, but do so faster and more smoothly. Unlike their predecessor, they do not walk off ledges, instead stopping at the edge on one leg and extending the other forward into the air before going into reverse.
Due to their fast speed, large hitbox and ability to stick one leg out even after reaching the edge of a platform, they can sometimes surprise Mega Man and deal collision damage that is hard to avoid without expecting the enemy.
Related Enemies
Peterchy (Mega Man 3) - A smaller and somewhat slower version that walks off platforms.
References
↑Mega Man: Official Complete Works art book, 2009.