Spike, also known as Spike the Dragon,[note 1] is a male "pre-teen"[5][note 2] dragon and one of the seven[6] main characters[7] of My Little Pony Friendship is Magic. He is Twilight Sparkle's best friend and number one assistant. He has the ability to magically deliver scrolls to and from Princess Celestia with his fire breath, which features in many episodes, as does his crush on Rarity.

In the season eight episode Molt Down, Spike gains a pair of wings after undergoing a developmental stage for dragons called the "molt".

In the Generation 5 My Little Pony: Make Your Mark episode The Isle of Scaly, Spike reappears as a fully grown dragon and the current Dragon Lord after spending centuries in magical hibernation.