If you are playing the game on a PSP emulator like PPSSPP, you can use CWCheat codes to modify your save file in real-time.
Digimon World Re:Digitize , you can use official in-game passwords for items or external CWCheat/Action Replay codes for more powerful effects. 1. In-Game Passwords (Jijimon’s PC) digimon world re digitize cheats
Happy raising, Tamer