Sonic Man (Roboticized Master)

Sonic Man is the robotized version of Sonic the Hedgehog, who is upgraded using technology from Mega Man's world that transforms him into a robotized master. Unlike the Mecha Sonic that appeared in Mecha Madness, this robotized master version of Sonic resembles a robot master found in Mega Man's world rather than a Robian.

Two Worlds United, Two Heroes Corrupted
In the first act of Worlds Unite, the solicts state that both Sonic and Mega Man are ambushed by Sigma & The Deadly Six, operating from Eggman's Lost Hex base. After being captured, the seven villains force Dr.Wily and Dr.Eggman to reprogram Mega Man, turning him into M'egga Man, using Eggman technology, and transforming Sonic into Sonic Man, A robotized master. While M'egga Man is sent to cause havoc in Sonic's world, Sonic Man is sent to Mega Man's world to cause havoc.