The only method to use those kinda of
cheats is to use an applet as the entry point for an exploit to use code that would inject into ram of the game. The n3DS uses a different browser then o3DS and the spider exploits don't work on it. You won't be able to use another game or CIA to inject because only applets allow you to use them with a game suspended. You can't run two applications at once, so you can't use a CIA application to inject into another game, since one or the other has to be closed.