|This needs a stretch.|
Two rock monsters that looked like stalagmites lived in Badcarl's Cavern.
The Richie Rich/Scooby-Doo Show
When Shaggy Rogers, Scooby-Doo, and Scrappy-Doo had a picnic in the cavern, the monsters ate some of Scooby's picnic food and then chased the trio. They were defeated when Scrappy splashed them with water and shrunk them to the size of "pet rocks." (Scooby At The Center Of The World)