Cocoa Island

Cocoa Island is the island that appears in the game, Tails Adventure. The Battle Kukku Army attacked Cocoa Island for the sole purpose of taking the Chaos Emeralds. The locations are Tails Lab (or house), Polroy Forest, and Cedar Forest to name a few.

Trivia
In the U.S. version of Tails Adventure, the manual referes Cocoa Island as Tails Island. It is unknown whether it is change in the story or a mistake.