It's a quiet day in the Mobuis Kigdom(Mario and Sonic's world combined) then CRASH! a comet crashes on earth. Bowser and Eggman get to it first. ButSonic and the group defeat them and uncover a messenger... the messege is very clear. THE END OF THIS UNIVERSE IS NEAR! alarmed by the message the group takes a journey into space. jumping from planets to planet the group collects the galatic rings. told that these are the only way to prevent the universes destrucion. but things actullay worsen. in a try to use the choas emeralds they are shattered destroyed forever... but that doesn't stop our heros! they mush travel to the center of the universe to stop this new threat. but don't count out Bowser and Eggman! hey re also trying to prevent the universes deestrution but only to rule it. They also hear that this threat was the one to forced Sonic and Mario's worlds together! what will happen to the group once this treat is defeated?