After The Shattered World Crisis crisis rocked Angel Island, Knuckles ventured to the area under the instruction of a mysterious force to search for a "weakened spirit". While here he was attacked by a group of Dark Gaia's Minions, and aided by the arriving Chaotix, who were searching for a Chaos Emerald in the region. A brief search led to a confrontation with the Hooligans, who were also seeking the Emerald, and both parties later entered the Aquatic Mine below the surface. They later reemerged with the Emerald and Knuckles' spirit charge, with the Chaotix tricking the Hooligans into believing that both had escaped them. (SU: #63, #64, #65, #66)
- Pumpkin Hill was a level from the game Sonic Adventure 2, which could be played through as Knuckles.