Koko
 | Phantom Stallion (1954) Rex's Horse |
 | Red River Shore (1953) Rex's Horse (as Koko the Miracle Horse of the Movies) |
 | Shadows of Tombstone (1953) Rex's Horse |
 | Down Laredo Way (1953) Koko, Rex's Horse (as Koko the Miracle Horse of the Movies) |
 | Iron Mountain Trail (1953) Koko |
 | Old Overland Trail (1953) Rex's Horse |
 | South Pacific Trail (1952) Koko |
 | Old Oklahoma Plains (1952) Koko |
 | Border Saddlemates (1952) Koko - Rex's Horse |
 | The Last Musketeer (1952) Koko |
 | Colorado Sundown (1952) Miracle Horse of the Movies |
 | Utah Wagon Train (1951) Koko, Rex Allen's Horse (as Koko the Miracle Horse of the Movies) |
 | Rodeo King and the Senorita (1951) Koko - Rex's Horse |
 | Hills of Oklahoma (1950) Rex Allen's Horse (as The Miracle Horse of the Movies) |
 | Typhoon (1940) Koko |