Pokemonfanatic i had/have the same problem with my AR but with Pokemon Ruby, But if you have cheats for blue on your AR and it's not registering you have to:
1) turn on your gameboy (with the AR and blue in it ofcourse)
2) when it says do you what to register details for the game now so
no
3) Go down the list to pokemon blue
4) tick the codes you want
5) Press start and the game will start with the cheats enabled
This works for AR Max may vary with different ones
ANd if it still doesn't work look and see if the Master Code is correct
pokemon champion wrote:
i would not use them i heard they can really mees your game up
This isn't true, The only codes that mess up your games are when you hack in pokemon, and i know how to avoid that aswell