The drop rates were notoriously abysmal. Some rare cards, like Gate Guardian or Exodia pieces, had a drop rate estimated below 1%. For completionists, this meant thousands of duels. Hence, the desperate search for a cheat.
For the technically inclined, using a hex editor (like HxD) to modify your save file’s card ownership flags is possible. This is tedious and risks corrupting your save, but it works. yu gi oh power of chaos unlock all cards cheat
These are myths. However, . The community has developed three primary methods to bypass the grind. The drop rates were notoriously abysmal