Mock Disc

The Mock Disc is used to appease the Dog Ghost as a substitute for the Disc. It can be found in the room above the dog shrine room where the ghost dog dwells. You'll need to use it again to gain access to the P. Flame. Picking up the Mock Disk after obtaining the Disc will cause the dog ghost to chase you again.

Location

The location of the chest that contains it.

Above the dog shrine where the dog ghost is originally. It is behind a button gate. You'll need to work your way around using tunnels guarded by dogs (to the left of the dog shrine is where the path starts).