Robot Master
Robot Masters are Bosses in the popular Capcom series, Megaman. Every robot master was a powerful robot with different abilities. Every Robot Master ended with "Man" in their name. MFGG has some Robot Masters, and some fake ones.
Robot Masters
Cutman - Although he often uses his Cutgoth character, Cutman has been around MFGG for some time and has always used his old Robot Master character.
Cloakbass - Not exactly a true Robot Master, but Bass is a Robot created by Dr. Wily nevertheless. Cloakbass is based off of Bass's Battle Network counterpart, who just so happens to wear a cloak.
Quickman - Originally based off the Quickman character from Megaman.
Fake Robot Masters
Shadowman - He has never actually said he is based on the Shadow Man from the Megaman series, although he did make a fake picture of Shadow Man with his head on.
Iceman3k - Iceman3k is just another Mario edit, nothing to do with THE Ice Man.
Hippoman - Not an actual robot master, but would probably make a good one.
Other
Mugenmidget - Not a robot master, although his character has usually been a Metool from Megaman.
Thunder Dragon - His original character was based off of Magma Dragoon, a boss from Megaman X4. While he no longer uses that incarnation of the character, one can't help but associate his username with the maverick bosses of the Megaman X series.
Naoshi/Msonic - is half based off Megaman, half from Sonic. He has a Megaman styled gun on his arm.