|First appearance:||Ultraman ZOFFY: Ultra Warriors vs. the Giant Monster Army|
|Affiliation:||unknown alien race|
Mysterious Disk (謎の円盤) is the only non-stock footage monster shot in Ultraman ZOFFY: Ultra Warriors vs. the Giant Monster Army.
Most likely a UFO riden by a unknown alien race. The mysterious disk appeared after Zoffy introduced Geronimon and tried to shoot Zoffy with its Laser beam but was deflected by Zoffy. Then Zoffy destroyed the enemy space-ship using his M87 Ray.
- The Mysterious Disk could have been inspired by Robo-Fo.
Powers and Abilities
Laser: The mysterious disk can shoot a laser to defeat enemies.