Super Knuckles

Knuckles has the ability to power up using the Chaos Emeralds. When he does this, he becomes either Super or Hyper Knuckles. His appearance in these forms varies. As both, Knuckles has appeared in a hot pink form, an indication of his power increasing (In his Hyper form he has also appeared with a pelt that flashes the colors of all the Chaos Emeralds). When Knuckles is in his super form, he gains invicibility and all his powers and natural abilities are enhanced up to his full limit, making him as powerful as Super Sonic and Super Shadow.

Super Knuckles can run twice as fast as Knuckles and he is twice as powerful, can fly, Super Knuckles also gains the ability to destroy all on-screen enemies by gliding into a wall, causing the ground to shake. In the final stage of Sonic Heroes, a "Super" version of Knuckles can also shoot fire balls from his fists.

Unfortunately, Super Knuckles in Sonic Heroes was not included in the final stage as Super Sonic was; he only had a bubble around him, which was a dissapointment to fans. Fans are hoping for Super Knuckles return in the next generation of Sonic games.

In the Archie Comics, Knuckles can use 7 Chaos Emeralds to turn into Hyper Knuckles. Knuckles can also use the Master Emerald to turn into Super Knuckles (In the Archie Comics, Super Knuckles is more powerful than Hyper Knuckles). As both, Knuckles has appeared in a hot pink form. Knuckles was also able to turn into a green-colored Chaos Knuckles. This was Knuckles' most powerful form, but he lost this power when he came back from death. In this form, Knuckles was the most powerful Chaos entity of Mobius (second only to Chaos, who was currently inshrined in the black emerald).