According to Twilight, Cerberus is responsible for guarding the gates of Tartarus and that, with Cerberus away from Tartarus, the "ancient evil creatures" imprisoned there could escape and destroy Equestria.
Breezies share their name with a G3 race of fairy-like ponies.
A bugbear appears in the season five episode Slice of Life.
It is a large creature with the upper body, arms, and legs of a panda bear and the antennae, wings, and stinger of a bumblebee.
The bugbear was captured and imprisoned in Tartarus some time ago by Sweetie Drops, a member of a secret anti-monster agency in Canterlot.
A few creatures, like dragons and Diamond Dogs, have speaking roles and display sapience when interacting with the protagonists.
Others behave more like animals and neither speak nor display sapience.And the looming badge sale, at which point we'll begin our long nerve-wracking 2017 slide into Comic-Con mayhem.My Little Pony Friendship is Magic hosts an array of creatures that have a counterpart in both mythology and fantasy, some of which are far more removed from their realistic counterpart than usual animals. Don't get excited; there isn't a new Hall H or extra mile of Exhibit Hall being built. Here's one to put on your list: getting a San Diego Comic-Con badge so you can enjoy the upgraded convention center in all its fancy new cutting-edge technology.In English mythology, a bugbear is an imaginary creature designed to scare disobeying children, similar to the bogeyman.