Chuckie Gelso answered 1/8/2008 How Do You Enter The Codes On Action Replay Ds? First click the * button on the screen, next press with the a button, then type in the name you want to call the code, then type in the appropriate letters/numbers for the code(0,1,2,3,4,5,6,7,8,9,A,B,C, D,E,F) :)