Diablo is Maleficent's pet raven, and the secondary antagonist from Disney's 1959 animated film Sleeping Beauty. His bird-like vocal effects were provided by Dal McKennon until his death in 2009 and currently by Frank Welker.
He appears to have a similar role to The Queen's Raven in Snow White and the Seven Dwarfs. However, this raven plays a larger role in the storyline and he is in almost every scene that Maleficent appears in. In addition, unlike the raven in Snow White, Diablo is completely and genuinely loyal to Maleficent and, unlike the rest of her servants, he is competent and easily succeeds in his task to find Aurora. Diablo is also the only one Maleficent genuinely cares about, and is horrified when he is turned to stone.
Diablo is first seen with Maleficent, crashing Princess Aurora's christening. There, Maleficent casts a spell on the princess that schedules her death to come at her sixteenth birthday when she pricks her finger on the spindle of a spinning wheel. After the curse was set, Diablo and Maleficent departed. Oblivious to the villains, Maleficent's rivals Flora, Fauna and Merryweather changed the curse so that Aurora would only fall into a deep sleep when she pricks her finger. Meanwhile, back at the Forbidden Mountains, Maleficent sends her goons on a hunt for the princess but fail to find her after sixteen years. It is revealed that they were foolishly looking for a baby for the entire sixteen year hunt. Maleficent explodes in rage and sends Diablo to find her. Diablo begins his search in the forest where he spots magic from wands being blasted out of a chimney. The magic is from Flora and Merryweather who have been hiding Aurora in their forest cottage to keep safe from Maleficent. Diablo knowing about where they live, quickly flies off and sends Maleficent the news to her great delight, and the villains attack but capture Aurora's husband-to-be Prince Phillip instead. They hold him hostage in Maleficent's castle but the Three Good Fairies break him out. Diablo quickly rallies the goons to attack. However, the goons stand no chance against the fairies' magic, so Diablo heads for Maleficent's quarters. Merryweather gets mad at Diablo and turns him into stone. Maleficent emerges and does not notice Diablo has turned to stone when she orders silence.
Diablo made frequent cameos as one of the guests on House of Mouse. He is perched on Maleficent's shoulder in all of his appearances. In the episode, Halloween with Hades, Diablo doesn't seem to like Hades and even tried to bite his finger. Diablo also appears alongside the villains in Mickey's House of Villains.
Diablo appears from "Shell Game" to "Dark Passage", acting as Maleficent's scout on the Dream. He sends Ovetaker henchmen to attack the Keepers, making sure to always stay out of harm's way. He attacked Willa and Philby in the kitchen, getting captured. Because of the injuries Diablo had inflicted upon him, Philby considered killing the bird by cooking it alive. However, Diablo was luckily spated by Willa not wanting to stoop to the Overtakers' level, mercifuly trapping Diablo in a microwave until it had to be opened for cooking. He later catches Walt's journal on how to completely revive Chernabog, when the Keepers toss it overboard to keep Maleficent and the Queen from getting it.
When Maleficent and the Queen search for Chernabog in a maze, Diablo attacks Finn, only to be knocked aside into a wal. His defeat, only serves to let Maleficent's anger mislead her into turning into a dragon to kill Finn in revenge. However, Diablo was used as a shield, so Finn could rip out Maleficent's throat. His fate remains unknown, but he may have chosen to die from a lack of nutrition as his master had died.
Diablo will appear in the film under the name of Diaval. He is Maleficent's right hand man and is actually a human who can take a raven form.
Diablo appears as a minor antagonist in the Kingdom Hearts series, mostly seen on Maleficent's shoulder on certain occasions.
When Prince Phillip and Aqua are trying to escape the Forbidden Mountain so they can reach King Stefan's castle to awake Aurora from the spell, Diablo is the first to notice them escaping and quickly summons the Goons to attack them.
While Flora, Fauna and Merryweather were giving Sora his new outfit, Diablo is seen watching them from high up above the tower's window, remaining unnoticed, and quickly flies off. Sometime later, Diablo, brings Maleficent's empty robe to Yen Sid's tower, and the memories of Flora, Fauna, and Merryweather accidentally bring her back to life. Later on, Pete travels to Hollow Bastion to see if the rumors of Maleficent being killed off was true. Just then, Diablo and the revived Maleficent arrives.
Diablo has made a few appearances in the Disney theme parks around the world, always seen alongside Maleficent. He appeared on Maleficent's staff in the Magic Kingdom parade Celebrate A Dreams Come True Parade. Diablo would sometimes appear on Maleficent's shoulder in some Disneyland Paris shows. Diablo also appeared in a few attractions including Sleeping Beauty Castle walk-through and Sorcerers of the Magic Kingdom. A statue of Diablo can also be seen near Le Château de la Belle au Bois Dormant.
- Diablo is, without a doubt, Maleficent's only competent henchman.
- Like Jafar does with Iago, Maleficent treats Diablo more like an assistant than a pet.
- Diablo is the Spanish word for "devil".
- Diablo was not actually named in the film itself.
- The scene where Maleficent reacts to Diablo's transformation into a statue, prompting her to attack the heroes at end of Sleeping Beauty may have inspired a similar scene near the end of The Little Mermaid where Ursula attacks Ariel and Eric after accidentally killing her pet eels.