Draconequus are a hybrid species. The only Draconequus encountered or at least mentioned in Equestria's long history is Discord. He is most likely a one of a kind creature.
Before Celestia and Luna ruled over Equestria, the land and indeed probably the world was held in the grasp of the Draconequus Discord. Discord ruled over Equestria, maintaining a constant state of chaos.
Discord was defeated when Celestia and Luna discovered the Elements of Harmony and used their power against Discord. Discord was turned to stone, frozen in an almost jovial pose, possibly suggesting he hadn't expected the Elements to work.
Before the WarEdit
Discord broke free and began to reinstate his chaotic reign. He continued to change the landscape of Ponyville, desiring to make it the chaos capital of the world. Discord toyed with the Mane 6, leading them through a maze where he made them turn their backs on one another. Discord, confident in his victory, seemingly unchallenged, admired the chaos engulfing Ponyville. The Bearers of the Elements used them to once again petrify Discord.
Discord's statue was still in Canterlot when the megaspells hit. Discord is believed destroyed or diminished and lives on in legend, said to be the one who drops random ammunition and bottlecaps in various containers.
Draconequus are a chimera species like Griffins, being a fusion of many more creatures. Discord himself had a lion's paw, a griffins talon, a lizard tail, a reptiles legs and a goat's leg. He also had two yellow eyes with red pupils and two mismatched horns on his head. Two mismatched wings, a pegasus wing and a bat wing adorned Discord's back and his head was roughly ponyesque.
Draconequus have demonstrated the ability to use powerful, reality altering magic. This magic is exceptionally powerful, with Discord being capable of manipulating the sun and moon, altering pony minds, creating pink cotton candy clouds that rained chocolate milk and spawning things from nowhere all with the snap of a finger. The very source of his reality manipulating abilities is unknown.
In Side StoriesEdit
Draconequus have also appeared in Side Stories.
Discord himself appears in Project Horizons, his power diminshed from 200 years of being drained for Flux. He was moved to Hoofington during the war since it was feared the zebra would take him and use him against Equestria. Not wanting to risk his escape, his statue was coated in Star metal making it impossible to escape on his own.
Discord was hooked up to drills and tubes which drained Flux from his body. He was left alone for 200 years, the machines turned up to full power, draining Discord for Flux. He thanked Blackjack for freeing him and aids in her escape whilst also granting her a perk.
Guise of ChaosEdit
Another Draconequus was captured by the Ministry of Peace in the hopes of using the chaotic potential of a Draconequus to heal. The Draconequus was called Pandemonium, his form and power were broken and contained within four Black Cubes , designed to perform specific purposes. Ripple sought out these cubes, since Hate wants them and their potential power for his own benefit.