Challie and Shannon are two conjoined twins and reluctant henchmen of Lucille Penn in Benny, Leo and Johnny’s Holiday in CA. Despite following the false officer, they have concern for other people (as shown when they feed Penn's captives behind Penn's back), especially those whom they are forced to lock away. Challie is the one with the left limbs and Shannon has the right limbs. In other words, according to their perspective, Shannon's the one on the right, while Challie is on the left. Eventually, they teach the Fantasy Adventures Team about Penn, and they also show Johnny how to unlock the cell containing Brandon and Gilgamesh. Finally, they have turned against Penn. Later, they turn Penn's lair into a homeless shelter, both outside and inside, but they haven't finished until the end of Benny, Leo, Johnny and Rae's Yellowstone Adventure (according to a letter).