: One critical piece was hidden by Fred's "father," Mayor Fred Jones Sr., which Professor Pericles eventually steals.
: Once assembled, the disk points the way to a sarcophagus containing an extradimensional "Evil Entity" that threatens reality itself. Scooby-Doo! Mystery Incorporated ...
In Scooby-Doo! Mystery Incorporated , the "piece" you're likely thinking of is a segment of the . This ancient, enigmatic artifact is central to the show's overarching mystery and is broken into six distinct pieces. The Planispheric Disk : One critical piece was hidden by Fred's