Sonic gets stuck on Earth again, and needs major help to get out again. He is so far into the future though, that Chris isn't alive anymore. Astro decides to help, but can their combined might save them from Dr. Eggman's most diabolical plan yet?

In a harsh battle against Dr. Wily and Tenma, Astro and Zoran are saved by two strange hedgehogs. Later, they explain their situation and our heroes get involved in the most thrilling adventure of their lives. Parody to SMBZ. Xovers: A & S & M/Z & MX & M ZX