Action Replay DS (World) (v1.54) (Unl) (日本語名: アクションリプレイDS (World) (v1.54) (Unl)) is a cheat device for the Nintendo DS. It allows users to enter codes to unlock hidden features, access special items, or modify game settings. It includes a database of codes for over 1,000 games and is compatible with both DS and DSi systems. The device is easy to use and requires no special hardware or software. Once codes are entered, they are stored in an internal memory and can be used on any game. Action Replay DS is an invaluable tool for anyone looking to get the most out of their games. With its support for both DS and DSi systems, it is the perfect cheat device for both novice and experienced gamers alike.