Ok so Eggman lost his memory, and when he recovered, he was really pissed. So he creates a virus that transforms al organic life into zobie robots or "zombots" as they call them. The virus spread on contact with that silver goo that eventually takes over your body so suddenly is "The walking dead" in sonic world and Vector had to use cars to imprision an infected citizen while she cries for help.

As a bonus, Sonic is infected too, but his super-speed allows him to burn of the goo as long as he keeps running. So he cant stop for a long time.

Team Chaotic proving why their my favorite Sonic characters. Out of the entire cast of kids, they are the adults of the group and as just have to face problems as one.