Racka Presley
Racka and Presley are two dragons who have been locked in the dungeon of Camelhot. They prefer to remain there and sing songs like "Home on the Rack" (a reference to Home on the Range).

Racka has potatoes growing on his back while Presley has other plants (such as four leaf clovers) growing on his back.

They appeared in the episodes Tournament Day, Merle's Mirror, The Lost Ruby Hat of Omar the Ham, and Excalibroke.

Racka is the taller of the two and light purple while Presley is the shorter of the two, and green.