Sigma – Mega Man X Series
It shouldn’t be that surprising that Sigma never stayed dead but it’s insane just how many returns he’s. In Mega Man X1, he led the Mavericks and put up somewhat of a tough fight, first showcasing his beam saber skills and then having his detached head control a giant robot. Mega Man X2 saw him utilizing dual claws and more teleporting before…turning into a giant wire-frame head. Of course, by this point, it’s revealed that Sigma is a computer virus and will keep coming back, stronger than ever each time. This trend continues throughout the series but perhaps his best appearance is in Mega Man X4. Sigma is battling the boss who has eye lasers before taking on a giant teleporting form with floating robot heads and a massive head littered with wires.
