Tonton Streaming The Land Before Time (2007) S1E15 - The Spooky Nighttime Adventure

One night, Ruby tells the group a scary story about an invisible dinosaur named 'Hidden Runner and gives everyone scary sleep stories. They see Mr Thicknose to tell him that she made up the story and there is nothing to worry about, but the story of Hidden Runner was true, and they decide to venture into the Mysterious Beyond to search for him.