Open Legend Reborn and head to the Deck Construction screen. You should now see three copies of every card available. Method 2: Replacing the Save Data ( system.dat )
Another common method is sharing 100% complete save game files. By downloading and installing a save file from someone else who has already unlocked everything, you can gain access to all cards without using a software patch. There's also ongoing discussion within the modding community about creating universal "unlock codes," though these are often custom-made for specific games and may require technical knowledge to develop. yugioh legend reborn all cards unlocker
Is using an all-cards unlocker "cheating"? Open Legend Reborn and head to the Deck Construction screen