Sonic the Hedgehog Mega Man

"The sequel to the record-shattering Sonic the Hedgehog and Mega Man crossover is here! You saw what happened when oWorlds Collide!o Now brace yourself for when WORLDS UNITE! Sigma-the brilliant villaSigma--the brilliant villain from the future--has fused the worlds of Sonic the Hedgehog and Mega Man together! Now he feeds on the super-planet's energy to become unstoppable!