Delta allows you to use cheat codes made for Action Replay, GameShark and other cheat devices.
Simply launch the game you want to add cheats for then tap on the Cheat Codes button in the pause menu. From there, tap the '+' button to add a cheat code.
When adding cheats, choose which 'cheat device' the cheat is for and then enter the name and code.
Once you add a cheat code, it will appear with a check mark to show that is enabled. To disable a cheat, tap on the cheat name.