Phantom Stallion

as Rex's Horse

Red River Shore

as Rex's Horse (as Koko the Miracle Horse of the Movies)

Shadows of Tombstone

as Rex's Horse

Down Laredo Way

as Koko, Rex's Horse (as Koko the Miracle Horse of the Movies)

Iron Mountain Trail

as Koko

Old Overland Trail

as Rex's Horse

South Pacific Trail

as Koko

Old Oklahoma Plains

as Koko

Border Saddlemates

as Koko - Rex's Horse

The Last Musketeer

as Koko

Colorado Sundown

as Miracle Horse of the Movies

Utah Wagon Train

as Koko, Rex Allen's Horse (as Koko the Miracle Horse of the Movies)

Rodeo King and the Senorita

as Koko - Rex's Horse

Hills of Oklahoma

as Rex Allen's Horse (as The Miracle Horse of the Movies)

Typhoon

as Koko