Chomper's parents are a duo of Tyrannosaurus Rex and two of the characters from The Land Before Time films. They are Chomper's parents and they are protective of him. At first they were antagonists when they attacked Littlefoot and his friends after barging into the Great Valley in search of their son. After being defeated by their parents, the two sharpteeth retreated, until they finally reunited with Chomper. They then chased Ozzy and Strut into the Mysterious Beyond after seeing them attempt to kill Chomper, as well as Littlefoot.
The duo eventually became protagonistic after seeing Littlefoot save their son from drowning after a battle with a plated sharptooth. They have been grateful since and promised not to hurt Littlefoot and his friends in any way.