As far as mecha in Tower City are concerned, The Manipod is odd. No weapons, paper thin armor, slow and physically weak. What it does possess is… at least something. Mecha are usually able to turn into arms, or legs, or heads for larger combiners. Most are only compatible with the ones that are required make their combined forms. Mixing and matching isn’t an option. 

However the Manipod snubs this rule. It has universal compatibility with all other mecha, and can assume the form of any missing part, or at least a strong facsimile. Just no heads. It doesn’t do heads. Not sure why. Tad just says it doesn’t.