Chernabog's minions appear to be quite evil, hostile, and mischievous for their personality. Several of them are shown taking glee in performing acts of debauchery, although it appears they are fearful of Chernabog to an extent, as the black god is not above subjecting his own followers to torment to amuse himself.
Chernabog's worshippers come in lots of different shapes and sizes. Most of the ones seen are ethereal cloaked specters or phantoms with bright glowing eyes. But there are witches flying on broomsticks and skeletal horsemen among them, as well as varieties of disfigured criminals, fallen warriors, fiery satyrs, harpies, small imps, and dragonlike demons. Most horsemen ride atop the backs of skeletal steeds, but others are seen riding atop the backs of other creatures - such as goats, boars, and even a cow. A combination of skeletal dogs or wolves, black cats, and swarms of bats are also among them.
During the "Night on Bald Mountain" sequence from Fantasia, Chernabog summons numerous ghosts, demons, and monsters from the graveyard of the village which Bald Mountain overlooks. They seemingly represent the pagan religions interpreting them as evil. Being summoned by him, they transformed into animals for Chernabog's delight as he throws them into the fire. With his own powers, he reveals that they are as disposable as they look, burning them in his own hellish flames. They, like Chernabog, are vanquished when the morning arrives.
The scene from "Night on Bald Mountain" is represented as Chernabog sends his army of demons to ruin Mickey Mouse's imagination under the orders of the Evil Queen. We see the face of a skull, a witch, and many other phantoms. They were destroyed in the final battle between Maleficent and Mickey Mouse, restoring the powers of Light.
All the varieties of minions appear to represent something deemed bad or sinful in the Christian religion. Chernabog represents Satan running Bald Mountain (hell) with his imp minions and punishing the souls for their sins. The witches and demonic horsemen are an allusion to the holy inquisition, the harpies and dancing satyrs could represent the fear of paganism, the fiery succubi refer to the temptation of lust, the dancing animals have allegorical associations with corruption and wickedness in both biblical scripture and practices, and the skeletons might be a metaphor for death itself or possibly the Dark Age due to their use by scientists at the time for studying human anatomy.
In "Fantasmic!" the songs have been remastered (not just Chernabog's theme but "Pink Elephants on Parade","Poor Unfortunate Souls" and the instrumental played when Evil Queen transforms) and the minions earned phantasmagoric sounds like screams and cries.
The ghosts come from their graves in a cemetery, but some come from gibbets. Leaving implicit that they disobeyed a law in life.
Some of Chernabog's minions (the witches, ghosts, skeletons, and henchmen) return to their graves and reform when the light repels Chernabog, but they possibly were called in for another Walpurgisnacht.
In Once Upon a Time, Chernabog's minions don't appear. However, the Wraith had a similar appearance to the ghostly minions with red eyes and cloak.
As Chernabog destroys his minions, the nipples on the female minions' bare breasts are briefly shown for a few frames.