Luigi may be a plumber and he has a lot of good acrobatic skills at the ready, but it simply won’t be enough to stop the Martian Manhunter. Martian Manhunter is one of the stronger members of the Justice League and his skills are pretty sound. One good punch would likely prove to be too much for Luigi to handle and the Martian’s speed will ensure that the blow connects. Martian Manhunter wins.