Diablo the Raven

Diablo is Maleficent's pet raven and magic familiar, frequently appearing alongside his mistress in the villain tournaments, where he is only rarely seen on his own.

He first appeared in the Disney animated film Sleeping Beauty.

The Battle In Egypt
Diablo plays a near insignificant role in the war, acting as Maleficent's pet. He is turned to stone by Rothbart's magic during the Battle of Egypt.

Return
Diablo has a greater symbolic role in the second war, as his resurrection is the primary test of Jafar's new genie powers.

A Quick Defeat
After witnessing the supposed death of Hades by the voodoo sorcerer, Doctor Facilier, and the fall of Queen Grimhilde at the hands of the noblewoman, Lady Tremaine, he rustled quickly to the Forbidden Mountains to warn Maleficent about the war's recent events. Unfortunately he was noticed by the noblewoman and before he can deliver his message to his mistress, Lady Tramaine turned him into a stone statue, much to Maleficent's dismay and rage when she met him outside of her chamber.

Ressurection And New Steeme
After the rise of Chernabog and his dark minions, the Black God spread his evil in every  of the Animated Universe. Unfortunately one part of the Great Evil released Diablo from his stone prison, ready to follow his mistress's commands again. However he learned that Maleficent had previously defeated in the Underworld, leaving only her dark cape in that area. Taking the cape to his advantage, he travelled in one of the portals, whom the Great Evil has opened during the final events of the war, to the Multiverse. There he dropped the cape, learning that if one person who previously died in his own dimension and transfered to another dimension, his dark memories will ressurect him in his previously state. That happens with Maleficent, who awakes in another universe and think a way about conquering it.

Afterwards
Diablo has not a major role after these events. He was last seen with his mistress, in the Animated Universe, when she rejects Hades's help after she learned his betrayal with Mirage and when Maleficent travelled to Grimhilde's castle and cured her from Doctor Facilier's Friends influence.