How Do You Unlock Debug Mode in Sonic and Knuckles?

Go to the level select screen and play tunes 1,9,9,4,1,0,1,8 (the date when the game was made.) Choose any level, then hold A and press Start to activate Debug mode.

How do I turn on debug mode on Sonic?

Debug is activated by pressing Triangle (or Y on Xbox, or X on Switch), then the jump buttons to place and rotate through options. Mania's move is a Drop Dash (hold jump in the air), Sonic CD's by holding Up then jump, and Sonic 3 and K Insta-Shield by pressing jump in the air.

What is the code for debug mode in Sonic?

ISBN 9770960495000-01. "Press B to get into the DEBUG mode. Press A to change the sonic character into another and press C to put this onto the playfield.