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This article's name is conjectural.
Although this article is based on official information, the actual name of the article's subject is pure conjecture.

"Blue Knuckles" completes Mushroom Hill Zone. Note how the score tally refers to him as Tails and the life counter displays Sonic.

Blue Knuckles is a term used to refer to a color palette glitch in the locked-on version of Sonic the Hedgehog 3 & Knuckles. Blue Knuckles uses Knuckles as base character, but due the coding error or corruption, the color palette changes to one used for Sonic.

Unlocking Blue Knuckles

There are two ways to unlock Blue Knuckles in Sonic the Hedgehog 3 & Knuckles. The first choice includes simply using a Game Genie and insert the following code: HWDT-YZCO. The more complex way involves doing a glitch that comes in different variations. One includes activating the Debug Mode as Knuckles. The player then goes to Data Select and must pick up the file that contains the Chaos Emeralds being collected. Right after selecting Marble Garden Zone from the same file, the player must then press start and A Button (Sega Genesis).svg down right before the flashing start on the title card. On the title screen, select Level Select and pick up Sonic (01), Tails (02) or both (00) in the upper left corner's number select, and press start to enter Hidden Palace Zone (while holding A Button (Sega Genesis).svg down for activating Debug Mode). Right from the start, the player can activate Debug Mode and move left on the pathway and make the rotation move quickly in the direction of the deactivated Super Emeralds on the altar. At the altar, the player can deactivate Debug Mode and land on one of Super Emeralds to enter the Special Stage. When either collecting all the blue spheres to or losing, the player is transported back to the corrupted Angel Island Zone, where Debug Mode has to be activated right away and move to the bottom until the game resets automatically (if this does not happen, the player has press reset button on the Genesis).[1]

After the automated reset, the player can go back to the Level Select menu. If the player sees the numbers "80", "81" or "82" on the Sound Test selection, the glitch is done correctly. The player can now enter any Zone as Blue Knuckles, while most of the time, the player encounters Egg Robo during boss battles and the Super State cannot be activated normally (unless the player is using S monitors). Due the program corruption of involving both Sonic (color palette and the chosen pathway) and Knuckles (base), certain Zones cannot be completed.


  • In standalone Sonic the Hedgehog 3, by hacking the game or using Game Genie (ASCA-AAHC or ASCA-BA9Y), the player can play as Knuckles, but many of the playable character's content relies on the Sonic & Knuckles cartridge. The player is basically using Sonic, but there are small content featured in the game, including Blue Knuckles' panel at the Signpost.[2]
  • Coincidentally, Knuckles has a color scheme similar to Blue Knuckles when posing as Sonic in the Sonic Boom episode "Eggman the Auteur".
  • When Blue Knuckles finishes an act, he is referred to as Tails in the completion blurbs.
  • Blue Knuckles can also be used in cutscenes. However, this needs to be achieved using Debug Mode.
    • If the player beats Knuckles' version of the Mecha Sonic fight as Sonic or Tails, the ending cutscene of Knuckles' story plays normally, albeit Blue Knuckles will be in place of normal Knuckles.
    • If the player beats Doomsday Zone as Knuckles, the palettes will be glitched, and Blue Knuckles is featured here.
  • If the player passes Knuckles in the standalone Sonic the Hedgehog 3 November prototype while he is doing his blocking animation, the red and green palette will change to a similar color to that of Blue Knuckles.


  1. Motobug (29 May 2013). Sonic 3 and Knuckles - How to get Blue Knuckles (Glitch Method). Youtube. Retrieved on 9 January 2021.
  2. Knuckles in Sonic 3. Sonic CulT. Archived from the original on 24 March 2016.

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