Knuckles the Echidna

Knuckles was one of the many heroes to be caught up in the Black Arms invasion of Mobius, where he and his allies where paralysed by a toxic gas released from the Black Comet. He is also known to have faced Metal Overlord, and worked together with the Chaotix-and their mutual friends Mighty and Ray-on multiple occasions. At some point he also made the acquaintance of archaeologist Relic the Pika, who convinced him to let her stay on the island even after it fell into the ocean.

The Shattered World Crisis affected Angel Island as it did the rest of the planet, and Knuckles was caught in the middle of it. As he watched, Chaos was thrown from the Master Emerald to Mobius' ravaged surface. Immediately thereafter, Tikal addressed him from within the Emerald and informed him of the situation, which she assured him was a phenomenon meant to occur. However, she also informed him that a powerful spirit was meant to participate in restoring the world, and that she sensed a weakness in that entity. As such, Knuckles determined to seek out the spirit so that Tikal could aid it. Fearing to leave the Master Emerald unguarded, he reluctantly approached Relic and her assistant Fixit to watch over the gemstone. Making his way to the surface, he traveled through the Sky Rail Zone, where he spotted Eclipse the Darkling's escape craft plummeting as it fled the destruction of the New Black Comet.

Continuing his journey, Knuckles ended up in Pumpkin Hill Zone, where he ran into some old allies: the Chaotix. Learning that they had been hired by Princess Sally to help locate the Chaos Emeralds, Knuckles agreed to help them, as he sensed an Emerald nearby. The group were forced to deal with the minions of Dark Gaia, and then ran into another opposing force: the Hooligans.