The Land Before Time VI: The Secret of Saurus Rock

Littlefoot notices that Doc has a visible scar across his right eye, exactly matching the description of the Lone Dinosaur from his grandfather's story. Additionally, Doc demonstrates unusual knowledge of the valley's terrain and rescues Littlefoot with impressive skill, leading Littlefoot to connect these clues to the legend.

Grandpa Longneck's story specifically describes the Lone Dinosaur bearing a scar across his right eye from his battle with the Sharptooth.

According to the legend told by Grandpa Longneck, damaging Saurus Rock will bring bad luck upon the Great Valley. When Dinah and Dana accidentally break off one of the rock's teeth, the valley subsequently experiences misfortune including a dried-up watering hole and a tornado.

The original legend explicitly warns that anyone who damages the monolith will cause bad luck to descend upon the valley.

The movie leaves this ambiguous. While Doc has the matching scar and demonstrates bravery, he never confirms or denies being the Lone Dinosaur. He simply helps the children and fights the Sharptooth when needed, then departs without revealing his true identity.

Doc knows the valley's topography incredibly well and appears at key moments to help, just as the legendary Lone Dinosaur would.

The misfortunes (dried-up watering hole and tornado) occur after the twins break the rock's tooth, leading characters to suspect a connection. However, the story ultimately suggests there is no such thing as real bad luck, the carnivores were the true threat, and the valley's troubles were coincidental or caused by natural events rather than supernatural punishment.

The timing of the misfortunes immediately follows the breaking of Saurus Rock's tooth, creating apparent cause and effect.

The Allosaurus appears to have survived its apparent death in the gorge. When Littlefoot returns to find a tooth for Saurus Rock, he discovers the carnivore is still alive and stalking the valley, leading to the climactic final confrontation.

The movie never shows the Allosaurus dying, only falling into the gorge, leaving the possibility open for its return.

After Grandpa Longneck bravely protects Littlefoot from the Allosaurus attack by leaping into danger, Littlefoot and Cera decide to honor him by creating a new legend. They recast Grandpa as 'The Brave, Great Dinosaur,' transforming the superstitious fear of the original legend into an empowering story about courage and community.

Grandpa Longneck's act of jumping in front of the Allosaurus to shield Littlefoot demonstrates the heroic qualities worth legend-making.

Doc departs after the battle, telling Littlefoot that he already has a hero to depend on, Grandpa Longneck. This suggests Doc's role was temporary, helping the young dinosaurs through their crisis while teaching them to trust and rely on their own family and community.

Doc appears whenever help is needed but never establishes himself as a permanent resident of the valley.

After defeating the Allosaurus and Tyrannosaurus, a tooth falls from the Allosaurus carcass. The children use this actual Sharptooth tooth to replace the broken piece of Saurus Rock, symbolically restoring the monolith and ending the perceived bad luck.

Littlefoot's original plan was to find a Sharptooth tooth to replace the missing piece, which directly leads to this resolution.

Cera's father scolds her for not watching over Dinah and Dana properly, reminding her that she was given the responsibility to keep the twins safe. This reflects the story's theme of growing up and taking responsibility, which Cera ultimately proves herself capable of during the storm.

After the tornado, Dinah and Dana recount how Cera saved them, leading her father to praise her bravery.

Littlefoot feels guilty because he was the one who first told the legend and convinced his friends to journey to Saurus Rock. He believes his actions led to the twins breaking the tooth and subsequent misfortunes in the valley, even though he was not directly responsible for the break.

Littlefoot's nightmare about the rock collapsing shows his subconscious guilt about the entire situation.

During the climax, both the Allosaurus and a Tyrannosaurus threaten the group. Grandpa Longneck and Doc work together, with Doc arriving as backup. The two long-necks join forces to topple a rock spire onto the carnivores, crushing them beneath the rubble and saving the valley.

The legend described the Lone Dinosaur using his lasso-like tail to subdue the Sharptooth, though the movie adapts this to a cooperative rock-falling strategy.