Be Cool, Scooby-Doo! (2015)

S1E7 Be Quiet, Scooby-Doo!

To unravel the enigma of a sinister creature known as the Crystal Crawler—a bat-like monster lurking in the caves—the Gang has to explore the Crystal Canopy, a maze filled with delicate crystal structures. Complicating their mission, they must remain completely silent, as any noise could trigger a catastrophic collapse of the crystals surrounding them!