Thank you for the advice and can't wait for the CTRPF.
The game I'm trying for action replay to work is a 3ds game Crimson Shroud. I couldn't find any ntr plugin so I might as well try making one for the first time.
What program do you suggest to change the AR code to gateshark?
(I was only able to find AR codes for crimson shroud and no gateshark)