Sonic and Mario

You are Sonic the hedgehog Running in Green hill and you wave to your friends, Tails the fox, Amy rose, Knuckles the echidna, Shadow the hedgehog and Rouge the bat, but as you leave, you run into a robot with a cloak so you spin dash it but suddenly it exploded and it took you and your friends out with it which caused you guys to end up in the mushroom kingdom where Mario and Luigi reside, turns out Dr egg man and Bowser are secretly teaming up to rule the world and it's your chance to stop it, what do you do?