Bluechidna

Bluechidna (pronounced Bloo-chidna) is a glitch character that appears in debug mode in Sonic 3 & Knuckles in Sky Sanctuary Zone in Knuckles level.

Appearance
After Knuckles destroys Mecha Sonic and starts to fly of in Sonic's plane turn into a object.Then when the island starts to rise, don't follow the island and wait for it to go off screen and turn back to normal.Knuckles and parts of his shoes will turn sky-blue.

Trivia

 * If Bluechindna turns Super/Hyper he will become Knuckles except the Shoes stay the same.
 * This glitch was discovered by DrakeTheYoshi on Sonic Classic Collection DS version.