The Holy Quail is a quail wearing a pope outfit. It only appeared in the episode The Quest for the Holy Quail.
Every year King Allfire and his knights seek the Holy Quail. They eventually found it and chased after it, all the way to Merle's Cabin of Despair and Occult Museum, where Merle was trying to feed Queen Griddle to Yugmort the Many-Fanged. In the end, it was Flicker who finally caught the Holy Quail, but Sir Loungelot took the credit for it. Afterward, Allfire and his knights roasted the Holy Quail and ate it.
- The Holy Quail is an obvious reference to the Holy Grail, which King Arthur and his knights seek in Monty Python and the Holy Grail.