Digimon World DS

Note: This game is also titled Digimon Story.

Cheat mode
Enter one of the following passwords at the purple portal inside Digimon Central to active the corresponding cheat function:

Ultima Sword, Ultima Helm, and Ultima Ring
Enter "42016002" as a password. Enter "50620106" as a password in the Japanese version of the game.

100% Scan of DotAgumon
Enter "20000630" as a password. Enter "82607991" as a password in the Japanese version of the game.

100% Scan of DotFalcomon
Enter "10407002" as a password. Enter "20406002" as a password in the Japanese version of the game.

Tamer rankings
Successfully complete indicated task to get the corresponding Tamer rank:

Bronze: Successfully complete the areas for the first Digimon God.
Silver: Successfully complete the areas for the second Digimon God.
Gold: Successfully complete the areas for the third Digimon God.
Platinum: Successfully complete the areas for the forth Digimon God.
Tamer King: Successfully complete the game.