While many sites claim to offer "UPD" (updated) mods for 2026 to unlock 6,000+ cards instantly, be extremely careful:
Because the official store is defunct, "unlocking all cards" typically requires third-party modifications or manual file edits: Modded APKs : Pre-patched versions of the game (such as those found on Yu-gi-oh Duel Generation Mod Unlock All Cards -UPD-