Hoofbeats of Vengeance
Rex, the Wonder Horse
Black Cyclone
Rex (as Rex the Wild Horse)
The King of the Wild Horses
The Black (as Rex the Wonder Horse)
Lightning Romance
A Horse (as Rex the Wonder Horse)
Rex the Devil Horse
The Devil Horse (as Rex - King of Horses)
Wild Blood
Rex, Mary's Horse (as Rex the Wonder Horse)
The Vanishing Legion
Rex
King of the Wild Horses
Rex (as Rex the Wonder Horse)
Plunging Hoofs
Rex (as Rex the Wonder Horse)
Parade of the West
Mankiller (as Rex King of the Wild Horses)
No Man's Law
Rex, a Wild Horse (as Rex the Wonder Horse)
Guardians of the Wild
Rex - a Wild Horse (as Rex the Wonder Horse)
Two Outlaws
Rex, a Horse (as Rex King of the Wild Horses)
Stormy
Rex (as Rex King of Wild Horses)
The Law of the Wild
Rex King of the Wild Horses
The Adventures of Rex and Rinty
Rex, The King of Wild Horses
Robinson Crusoe of Clipper Island
Rex, the Wonder Horse
King of the Sierras
Diablo
The Harvest of Hate
Rex, the World's Greatest Horse (as Rex the Wonder Horse)
Wild Beauty
Thunderhoof, a horse