Suggested by Destroyer Groundman’s very strong since his whole gimmick is that he can drill straight through the ground. Unfortunately for him this also works as a flaw in combat since his very design is made so he can’t be very agile. Kakuzu could jump all around the robot and Groundman would never be able to launch a real counter attack. He would simply be outmaneuvered at every turn with no real chance of mounting a comeback. Kakuzu wins.