Which universe crossover was introduced in the "Sonic the Hedgehog" comic issue #247?

The universe crossover introduced in Sonic the Hedgehog comic issue 247 is Mega Man. This crossover storyline brought together the two iconic video game characters, Sonic the Hedgehog and Mega Man, as they joined forces to stop their common enemies, Dr. Eggman and Dr. Wily, from taking over both their worlds. The crossover received great reception from fans, who enjoyed seeing these beloved characters teaming up in an exciting and action-packed adventure.