Although the Bing-Bong Bell was mainly used by Queen Delightful, a few other characters have used it: Starchbottom (through much hesitation) used it in "The Fairest in the Land" because the queen became a troll. In "Sleepytime", Sir Yipsalot used it to seek the help of The 7D because a sleeping spell was cast over the kingdom; only Sleepy arrived at the castle (he was already sleeping when the spell was cast) and together they managed to break the spell. (Sir Yipsalot had to press a button installed on the wall to have the rope come to him since he's a dog.)