The Demonic Yak was the disguise of Choden.
Physical appearance[]
It's a humanoid yak with yellow sclera eyes and large horns. It's head was surrounded by fire and it wore a blue and yellow cape.
Personality[]
It was shown to be very hostile and relentless. Chasing people on horseback and getting ahead of a race, even going far as to knock one of them off.
Skills and abilities[]
It showed to be very quick on a horse.
History[]
Scooby-Doo! World of Mystery[]
It first appeared and scared away Shaggy and Scooby when they confused him as one of the racers at the festival for a second. It later interrupted the racing event by getting ahead of all the riders and even knocking off the gang's friend Yeshe.
It made one last attack on everyone, but thanks to a clue found awhile ago, Velma was able to determine the culprit was Yeshe's younger sister Choden. As she was tired of still being treated as a kid by her brother and the rest of the family, she used the disguise to get back at him, and show everyone that she isn't a kid anymore, and even compete in the events at the festival. Her brother apologizes for his and the families joke decisions and everything was forgiven.

Choden unmasked.
Appearances[]
- Scooby-Doo! World of Mystery
- #66. Attack of the Yak!! (no lines)