|[List of appearances]|
The Walliper is a type of animal featured in Ninjago: Masters of Spinjitzu, identified specifically as a Yak. Kai, Jay, Cole, and Zane ride several of these animals in Ghost Story as they make their way towards Stiix; one of the animals eats Kai's breakfast, and it (or another) follows the rest of the Wallipers despite Kai attempting to direct it elsewhere. One of the animals is later turned into a ghost by Wrayth. In Peak-a-Boo, during their ascent of the Wailing Alps, Jay spots another Walliper and mistakes it for a Goat; when Kai corrects him, he suggests that it might actually be a Cow.