The Angel Island, part 1 and part 2 episode of the series Sonic Underground, which is an adaptation of Sonic 3 & Knuckles and is to replace, according to the author, the episode Friend or Foe ?.
Sonic, Sonia and Manic fly by fighter when they meet an unknown island, Sonic checks and finds Emerald, but is attacked by the Echida and steals the object.
The Flying Base founded by Robotnik falls on the ocean and the island loses its power and falls too. When Knuckles noticed that he was deceived, he decided to cooperate with the heroes. Temporally, the Robotnik rebuilds the base again.
- Knuckles the Echida
- Doctor Robotnik
- The zones in the episode are (first part): Angel Island, Carnival Night , IceCap and Lauch Base (second part) Mushroom Hill, Sandopolis, Lava Reef and Hidden Palace.
- Carnival Night in the episode is a city built by Robotnik.