3DS cheats problemer

[PikachuPrincess23]

I want to cheats on Fire Emblem Shadows of Valentia Echoes since I have hard time beat certain enemy and when I close Roselinda menu after choose cheats, I get this error
It's it not possible anymore to cheats on games?
I'm using Checkpoint.

 

[The_RagingDemon6460]

Perhaps you where using a cheat code which is corrupt or doesn't work for aome other Version, perhaps a cheatcode for an older Version of the game.
Either way if that were the case it would be shown as Red whenever you select them in the luma menu.