Yu-gi-oh Power Of Chaos Yugi The Destiny All Cards Unlocker [repack] -

If you prefer not to use a pre-made tool, you can edit save.dat with a hex editor like HxD:

On Windows 10/11, navigate to: C:\Users\[YourUsername]\AppData\Roaming\KONAMI\Yu-Gi-Oh! Power of Chaos Yugi the Destiny\ yu-gi-oh power of chaos yugi the destiny all cards unlocker