- You may be looking for the Sonic & Knuckles zone, Flying Battery Zone.
| "Flying Fortress"
The title card for "Flying Fortress".
||22 March 2000
"Flying Fortress" is the twenty-seventh episode of the Sonic Underground television series and the first of three episodes in the Chaos Emerald Crisis mini-series. The episode was written by Mark Edens and first aired on 22 March 2000. It was included in Volume 2 and Secrets of the Chaos Emerald.
The song performed in this episode is "No One Is An Island".
Sonic, Sonia, and Manic the Hedgehog's vacation is interrupted when Doctor Robotnik, Sleet, and Dingo arrive in the new flying fortress which is powered by a Chaos Emerald. The hedgehogs approach Knuckles the Echidna for help.