While on vacation and safeguarding the Chaos Emeralds for Sonic, Tails came across this peaceful island and dubbed it "Tails Island". He built a house here and all seemed peaceful when the bird army, the Battle Bird Armada, came looking for the Chaos Emeralds and attacked. Luckily, Tails was able to defeat them and keep the emeralds safe. This island also has three more, smaller islands around it. They are Green Island, Cavern Island, and Coco Island. But in truth, Coco Island is a flying, metallic base for the Battle Bird Armada called the "Battle Fortress". Other areas here are...
Poloy Forest
Volcanic Tunnel
Polly Mountain
Caron Forest
Lake Rocky
Lake Crystal