If you played the original Castlevania: The Adventure on the original Game Boy, you remember the horror. Not horror in a gothic, Dracula-sense—but the horror of a chunky, slow, flickering mess with no sub-weapons and a whip that felt like a wet noodle.
The answer lies in data integrity. Unlike a standard ROM, a WAD file interacts directly with the Wii’s internal memory. A bad WAD can cause (a "banner brick"). castlevania the adventure rebirth ntscuwad hit repack