Stone of Agony
The Stone of Agony is an item found in Ocarina of Time. It alerts Link to the presence of nearby hidden objects through a Rumble Pak plugged into the N64 contrroller. It is received in the House of Skulltula after collecting twenty Gold Skulltula Tokens.
In the GameCube port, dialogue in connection with the Stone is changed to refer to a "rumble feature" rather than Rumble Pak, as the was internalised on the GameCube controller, but it otherwise functions identically
In contrast, while the Stone of Agony is still an obtainable item in the Wii Virtual Console version, the rumble feature was disabled and it thus does absolutely nothing.