this is Pumeha. pumeha is a robot-fader bull mutant. he was part of an experiment that wanted to see the possibility of a Rahi fused with machinery. Pumeha survived, but has to use machines to breath, move around, and shoot things with his cannon arm.
Mutated robot (Which doesn’t make sense in of itself) or not the comparison between these 2 things cannot be made. With that aside, this build looks very awkward. I get that this is supposed to be a mutant, but he looks like a tabescrap. You should try to create more constancy with this MoC.
It’s okey I guess…through not what I would expect from a Fader Bull mutant…take inspiration from the original and see which parts you want to carry on in your creation.