They appear to be entirely mechanical creatures, and have a light blue face with one white eye, a pink body separated into two parts by a groove, and four blue legs.
Pink robots are unable to fly, climb or jump, so they walk horizontally. They are programmed to walk off of ledges and fall rather than turn at them. Contact with any side of the robot's body other than its head causes death. Landing on the robot's head kills the robot, and gives the player a slight boost upwards. The robots have the same speed as conveyor belts, meaning that if they are walking the opposite direction of the conveyor belt, they will stay in place.