The MK.2 is a better version of the MK.1, using electric servomotors for the legs, and hydraulics for the arms, head, and body. Its head takes some inspiration from old animatronic heads.
I used the MK.1 as a basis for the MK.2. CHANGES: The most noticeable change is the MK.2's head, which was modeled after real-life animatronic heads, such as the Rock-afire Explosion animatronics, and the original '90 Chuck E. Cheese animatronics. The MK.2, in lore standards, was meant to be a better MK.1, so Roblox Robotics modified one, by having some of its "useless" parts -such as the fingers, shoulders, and teeth (which were never seen due to the plaster shell covering them)- removed to lower production costs and made it easier for the animatronic's shell to put on/off. Another noticeable change is the lack of leg hydraulics. Instead, electric servomotors handle the legs. Power is provided by a (used) car battery located at the right side of the MK.2's hip. Opposite the battery is the AI control board, which grants the animatronic's AI and operates the entire body, hydraulics included. The reason a car battery is used is "it's just cheaper than just making a custom battery". The animatronic's voice box is located at the right of the MK.2's head, just under its right eye.