The Worlds Collide crossover with the "Sonic the Hedgehog" comic began as a result of Wily's minions locating one of the Chaos Emeralds from Sonic the Hedgehog's reality, which enabled Wily to make contact with Dr. Eggman. Realizing that they had much in common, the two scientists formed an alliance with an eye at reshaping both their universes as they saw fit, including the elimination of their hated rivals. Their plans initially saw success, as they were able to alter their worlds, turn several of Sonic's friends into "Roboticized Masters" who combined both their evil technologies, and trick Sonic and Mega Man into fighting each other. However, once the two heroes realized the error of their ways and joined forces, they made swift headway against Eggman and Wily. The alliance between the pair turned sour after Eggman attempted to kill the imprisoned Dr. Light-something the more moderate Wily didn't condone-and they were eventually defeated, with Mega Man restoring his universe to normal. With no memories of ever contacting Eggman, Wily prepared to embark on his next plan, only to have Ra Moon betray him and blanket the world in an electromagnetic field that shut down all unprotected machinery. Wily's second line of Robot Masters fell under Ra Moon's control, as did the Ra Thor robot Wily built with Ra Moon's technology in an effort to destroy it. However, Break Man and his first line of Masters remained loyal to him, and teamed with the arriving Mega Man to battle Ra Moon's forces, which led to Ra Moon's destruction.