What happens at the end of shadow the hedgehog 2005

shadow gathers all 7 chaos emeralds sonic and friends pop up say dont give the emeralds to black doom there trying to destroy the world. black doom takes the emeralds and uses chaos control to warp down the black comet to the earth. black doom puts a parilizing gas on them shadow breaks free and goes to find black doom, then u do a level called the last way. after that you do the boss devil doom is waiting for u. u beat him with super shadow.