Board Thread:Speculation, Theories, and Rumors/@comment-6858788-20141218003512

In Sonic 3, Adventure, and Adventure 2, Knuckles always stayed on Angel Island. The only reason he left is because he had to repair the Master Emerald. Now, as of late, Knuckles doesn't even mention the existence of Angel Island! In Sonic Boom, Angel Island doesn't exist, so that doesn't count. 