Super Mechagodzilla appears in season 5 and appears in episode 40:Robot Wars.
Super Mechagodzilla was encountered by other robots and he fights the other monsters. Super Mechagodzilla was about to fire his garuda cannons but realized Cyber-Zilla had ripped it off. Super Mechagodzilla turned around and finished Cyber-Zilla. This allowed Mecha-King Ghidorah to incinerate the poor mech.