You and Pibby ended up in Green Hill Zone, you wander around a bit and meet Sonic, he offers to join your team if you help him beat Dr Robotnik. So, you help Sonic save the world and everything is going fine until the Darkness closes into all of you, but, before everyone got infected, the Darkness disappeared and sent you to the credits. Then, both you, Pibby, and Sonic end up in the world of Super Mario World. Sonic runs off to see if there is anyone who can help while you and Pibby are talking with a nearby Koopa Troopa. Sonic meets Luigi and Luigi says that he'd like to help when suddenly infected versions of Kirby and Megaman come out of the shadows and infects both Sonic and Luigi. Mario and Yoshi are having a stroll when the infected Sonic and Kirby come up to him. Soon, the infected Luigi and infected Tails come along. Mario and Yoshi decide to run away. Meanwhile, you, Pibby, and the Koopa save Mario from getting infected. You grab Mario's hand and run away with everyone else. Although, Yoshi seems to be infected.