Skip to content
Dr. Ivo "Eggman" Robotnik
Sonic & Knuckles

Dr. Ivo "Eggman" Robotnik

Learn how Sonic & Knuckles lock-on technology works, combining with Sonic 3, Sonic 2, and other Genesis games for new experiences.

By ···10 min read·Multi-source verified
1 reading this guide  

Learn how Sonic & Knuckles lock-on technology works, combining with Sonic 3, Sonic 2, and other Genesis games for new experiences.

Walkthrough
  1. 1
    Ensure the power to your console is OFF.
  2. 2
    Open the flap on the Sonic & Knuckles cartridge.
  3. 3
    Insert the second game cartridge into the Sonic & Knuckles cartridge slot.
  4. 4
    Close the flap.
  5. 5
    Turn on the console to play the combined game.
  6. 6
    To remove cartridges, ensure the power is OFF before flipping the flap and removing the games.
Tips
  • Always insert or remove cartridges only when the power is off to prevent data loss or game malfunctions.
  • Keep the edge connector of your second game and the Sonic & Knuckles cartridge slot clean to avoid issues like freezes, resets, or loss of saved data.
  • The following combinations unlock specific games:
    • Sonic & Knuckles + Sonic 3 = Sonic 3 & Knuckles
  • Sonic & Knuckles + Sonic 2 = Knuckles in Sonic 2
  • Sonic & Knuckles + Sonic 1/Sonic Compilation or most other Genesis/Mega Drive games = Blue Sphere

100% Human-Written. AI Fact-Checked. Community Verified. Learn how AntMag verifies content