The two doctors secretly programmed in a secondary objective into Sonic Man and M'egga Man that would have the two fight against each other and change back to normal once they returned to the hideout in an act of rebellion against Sigma, but they began fighting as soon aas the two worlds were merged. During the battle, they attack each other with their most powerful weapon, resulting them into changing back to normal instead of being destroyed.
Sonic Man retains Sonic's normal color scheme and sports his normal design, with a few added design choices. Among these, Sonic Man now has a buster on his right arm, his chest is made up of three horizontal segments in the same color as Sonic's skin, and Sonic's eyes now sport a color scheme similar to Metal Sonic's. He now has a golden "W" shaped symbol across his head as a reference to Dr. Wily, shoulder pads, and Robot Master-styled forearms and legs.
Sonic Man's abilities are similar to Sonic's, but enhanced by the roboticization. His speed is such that even time-influencing weapons such as Time Slow and Time Stopper do not have a significant impact on him. He also has an arsenal of weapons. According to Eggman, Sonic Man was formed by analyzing Sonic's data and fusing him with data from Quick Man.
Sonic Man's Spin Attack. He contorts himself into a spinning ball with spikes.
Fires a spinning blue energy blast from the buster. It can be charged to cause more damage, being Sonic Man's most powerful weapon. This is M'egga Man's weakness, causing him to change back into Mega Man when fired with full power.