Sonic the Hedgehog, Vol. 2 #251 (2013)

When Worlds Collide - Part Twelve: Best of the Best
The biggest crossover event of 2013 ends here with the stunning conclusion to Sonic/Mega Man: Worlds Collide (part twelve of twelve)! After an intense battle, Sonic and Mega Man are at the mercy of Drs. Eggman and Wily and, to make matters worse, the evil doctors have set the final stage of their plan into motion: to use the power of the Chaos Emeralds to become unstoppable demi-gods of destruction! But look out bad dudes, our true blue heroes have a plan, too - and it's 'super'! The history-making crossover event crashes to a close in the final chapter you can't miss! Featuring new cover art from Sonic and Mega Man art legend Patrick 'SPAZ' Spaziante and an all-new 'Evil Friends Forever' variant by superstar artist Ben Bates!
Release Date: 2013