Rust: This is a variant of sword/bow/hammer. This ability makes it so that when you hit an enemy, the surrounding areas of its wound will become rusted. This makes them slower and much more brittle
Cannibal-Bot: This robot starts out very small and runs away from the player. Once it detects that an enemy is killed, it will run towards is and attach the remains to itself. Eventually it grows into a large robot made of other robot parts.
NEW IDEAS:
Zom-Bot: A robot that can survive with substantially less body parts. Without both legs, it will use its arms to crawl at you, even when it only has one arm. Without any limbs, it will slowly hop towards you. Another possible idea is that maybe it will find its body parts that were cut off and attempt to rebuild itself. The best way to kill it is through decapitation.
Hallucination-Bot: When near this robot the players screen will become slightly darker. It will then imagine more robots around it that aren't real. MK-1 will only create a couple 'ghost' robots, and the robots will be fairly easy to differ from real ones, such as them being glitchy, jittery, and warped. Mk-2 will have them be slightly more real, and slightly more of them. The MK-3 will spawn a large amount of 'ghost' bots that are difficult to differ from real ones.