what is AP -nds games- and how to patch it

"AP" or "anti-piracy" is a script installed in a game to prevent it from being illegally copied. it ussually hinders the players progression in-game. for example, in Devil Survivor 2. (spoiler alert) there's an event when a certain character should hit the boss by driving a truck to ram it and weaken it but when playing with a back up ROM file, the player wont ever come instead, making the boss completely unbeatable. another one is in Yu-Gi-Oh! 2011 where the kids will ditch you and would never drop by the hideout/hq whatever they call that place lol.

but there's a program on how to remove this said patch, its called Discatia

Discatia is made to... basically its to remove the AP lol xD 

the product is downloadable here http://www.dicastia.com

tutorials on how to use it can also be found there.

note. if you have played the game on non-patched rom, you can still load it by simply renaming it with the same name as the patched one :)

HAVE FUN~ and remember. real fans buy game >.< support the devs :P