DJ Octavio

Origin: Splatoon (2015)
Type of Villain: Corrupt Royalty
Goal: To create sick beats and destroy Inklings

Description
The king of the Octarians, Octavio is responsible for the events leading up to Splatoon's Hero Mode Campaign, and serves as its final boss. Piloting a giant mech, Octavio creates sick beats and launches rockets to destroy you, often  missing due to their slow speed. In the end, he is defeated by the player and contained within a fishbowl shaped prison for his crimes.

"I'ma remix your face!"

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Nightmare Moon

Origin: My Little Pony Friendship is Magic (S1 Ep1)
Voice Actor: Tabitha St. Germain
Type of Villain: Godlike Being/Corrupt Royalty
Goal: To establish an eternal night

Description
In the land of Equestria, two sisters ruled the land as equals. Celestia the elder sister, controlled the day, while Luna the younger sister ruled over the night. However, their subjects played and worked during the day, while they slept through Luna's night. Years of loneliness and spite transformed Luna into a dark entity known as Nightmare Moon. The Nightmare attempted to overthrow Celestia and very nearly succeeded. Using the power of the Elements of Harmony, Celestia reluctantly banished her sister to the moon for a millennia.

"The night shall last forever!"

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King Sombra

Origin: My Little Pony Friendship Is Magic (S3 Ep1)
Voice Actor: Jim Miller

Type Of Villain: Corrupt Royalty

Goal: The enslavement of the Crystal Empire

Description

King Sombra is an evil unicorn with a heart as black as night. He subjugated the Crystal Empire, sealing away the Crystal Heart and enslaving the Crystal Ponies. He was eventually sealed away by the Royal Sisters, turned into shadow and imprisoned within a glacier. Before he was banished, Sombra placed a curse upon the empire, causing it to disappear for a thousand years. Now his seal is broken, and Sombra has returned to reclaim his Empire of slaves.

"Yeeessss, my cryssstal sssslaaavesss!"

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Yellow Diamond

Origin: Steven Universe (S2 Ep25)
Voice Actor: Patti Lupone

Type Of Villain: Corrupt Royalty

Goal: Destruction of Earth

Description

One of the four Diamond monarchs reigning over the Gem Homeworld. Yellow Diamond is in direct control of Homeworld's military forces and geoweapons, making her a powerful force to be reckoned with. Her utter disdain for Earth and its organic life have been made clear by her attempt to destroy the Earth with an inhumane Gem super-weapon known as The Cluster. If not for Steven and a rouge Peridot, Earth would have been torn to pieces. Thus Yellow Diamond would have killed two birds with one stone, all life on Earth would be destroyed, and she gets her geoweapon.

"You are to leave the Cluster to grow! It will tear apart the Earth, and I will take immense satisfaction in erasing that hideous rock off of our star maps! IS THAT CLEAR!?"

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