Skeletor (The king of monsters who declares war on the Fire Nation for their treatment against his kind)
Aku (Sinister demon king who was the person that gave Skeletor his powers. He is also the secondary leader of the faction)
Shadow Weaver (The wife of Skeletor and the queen of monsters. Was granted magical Powers by Aku after her transformation)
Trap Jaw (Skeletor's right-hand man and trusted general in his faction. He became a cyborg after getting attacked by Zhao)
Toffee (A manipulate reptilian monster who becomes the royal advisor of Skeletor in order to help him with his plans)
Demona (A vengerful gargoyle who serves as the faction's main enforcer and also as the main bodyguard for the king and the queen)
Zuko (Ozai's son who was exiled by his own father after he had stand up for his horrible abuse against the people of the Fire Nation. Joins Skeletor's faction to put an end to his father tyranny)
Beast Man (A fierce hunter who was turned into a monster and only works for Skeletor in order to become normal again)
Catra (Beast-Man's younger sister who was also turned into a monster and like her brother, works for Skeletor to return into her original form)
Slithe (King of the reptiles that joins forces with Skeletor to take down the Fire Nation once and for all)
Captain Grime (Slithe's second-in-command of his army and a trusted member in the faction)
Shendu (Giant demon sorcerer and a lieutenant in the faction)
Wuya (Shendu's lover who is a evil Heylin witch)
Krizha (A ancient sorcerer who was banished by the Fire Nation after planning to usurp Ozai's father. Helps Skeletor to finally get revenge)
Macha (A witch wjo joins the faction to avenge her son)
Assistants/Henchmen/Minions[]
Panthor (Skeletor's evil feline companion)
Scorpia (A half-woman, half-scorpion-like creature who is a sargeant in the faction)
Grune (Skeletor's general in his army)
Clawful (One of Skeletor's enforcers that is a giant crab monster)
Whiplash (One of Skeletor's enforcers who has a long tail that can knock out his opponents)
Kaynar (A jackal-like monster made into a enforcer by Skeletor into his faction)
Addicus (A ape-like monster who is a enforcer in the faction)
Two-Bad (Two of Skeletor's minion that were conjoined together as punishment for failling their mission)
Stinkor (One of Skeletor's minion who is humanoid skunk that can unleash a toxic odor)
Webstor (One of Skeletor's minion who is a humanoid spider)
Double-Trouble (A shapeshifer mercenary hired by Catra)
Shadow Beast (Monsters who are Skeletor's primary soldiers)
Skeletor's Griffins (Minor minions in the faction)
Lizardmen (Slithe's primary set of monster soldiers)
Dust Zombies (Zombies brought back to life by Shadow Weaver to served her husband's faction)
Warbots (Massive war machines used in the faction)
Shadow Ninjas (Demon ninjas who swear loyalty to Shendu)
Skulker (Ghost Hunter who was hired by the faction to kill their enemies)
Demongo (A demon summoned by Aku to assit the faction in the final battle)
Army of Hell (Demons that were summoned to fight in the final battle)
Fiery phantosaur (Creature summoned in the final battle)
Prince John (King of the animals who wants to stop a rebellion in his kingdom)
Sir Hiss (Royal advisor of Prince John)
The Sheriff of Nottingham (The captain of the faction's military)
Shere Khan (A cunning and deadly predator who is a main lieutenant in the faction)
Scar (The prince of a fallen kingdom who was recruited by Shere Khan for the faction. But after getting tired by John's incompetence, he convices Shere Khan to help him betray John and take control of the throne)
Zira (Fierce predator and Scar's mate who helps him in taking the over Prince's John leadership in the faction)
Napoleon (Dictador pig and a main chief general in the faction)
Cat R. Waul (Wealthy cat and a prominant member in the faction)
The Mouse King (A ruthless rat tyrant and a lieutenant in the faction)
Cluny the Scourge (Rat warlord and member of the faction)
Don Karnage (Notarious air-pirate who was hired by John to assist him in the final battle)
Chirin (Orphan lamb that was adopted by Scar in the final rounds)
Fire
Assistants/Henchmen/Minions[]
Prince John's Army (Prince John's primary army)
Rhino Guards (Soldiers and guards of Prince John)
Wolf Archers (Soldiers of Prince John)
The Executioner (The personal executioner of Prince John)
Trigger and Nutsy (A duo of dimwitted vultures)
Shenzi, Banzai and Ed (A trio of hynas who joined the faction due to Scar promisin the three being rewarded with food to eat)
Nuka (The son of Scar and Zira)
Vitani (The daughter of Scar and Zira)
Zira's Lions (Loyal lionesses of Scar and Zira)
T. R. Chula (The lackey of Cat. R. Waul)
One-Eye (Enforcer working for Cat R. Waul)
Frenchy (Enforcer working for Cat R. Waul)
Sweet William (Enforcer working for Cat R. Waul)
Felonious (Henchmen of Cat R. Waul)
Slim (Henchmen of Cat R. Waul)
Waul's Henchmen (Cat criminals working for Cat R. Waul)
The Mouse King's Mice (Followers of the Mouse King)
The Dark Wolf (Cunning wolf who leada a rebellion agaisn't Prince Jonh)
General Woundwort (A savage rabbit warlord who used to work for Prince John, before leaving his faction after questioning John's leadership. He later become the secondary leader of the alliance)
The Wolf (Another wolf and a main lieutenant in the faction)
Big Bad Wolf (Another wolf who is a good friend with Dark Wolf)
Scarface (Leader of a group of ailver foxes who joins the rebellion to protect his tribe)
Kaa (A snake who can hypnotize his victims. Recluted by Dark Wolf due to his abilities)
Slagar the Cruel (A devious fox and lieutenant in the faction)
Farley the Fox (A vicious fox and lieutenant of the rebellion)
Ape Shaman (Leader of a ape men tribe)
Krog
Flippy (Bear hypnotize by Kaa to work for the rebellion)
Badru
Assistants/Henchmen/Minions[]
Vervain (Trusted follower of General Woundwart)
Captain Campion (Captain Campion (Another follower of Woundwort)
Lady Blue (Scarface's mate)
Blue Foxes (The tribe of Scarface)
Three Little Wolves
Fuzzy Lumpkins (Monster hillbilly and a enforcer in the rebellion)
Yano (A porcupine gangster and enforcer in the rebellion)
Apemen
Farm Animals (Innocent animals hypnotize by Kaa to served the rebellion)
Cruella De Vil (CEO of her company who recently finds herself in financial troubles thanks to Burns Industries. Entually declaring war on the rival company)
Percival C. McLeach (Notorious poacher who becomes main chief lieutenant of the company. He laters stars a relationship with Cruella herself)
The Penguin (Crime boss who becomes Cruella's business partner in her company)
Voltura (Cruella's old chilhood best friend who is a supervillain and member of the criminal trio, The Flock of Fury)
Black Cuervo (The daughter of Voltura and the youngest
Lady Gobbler (The mother of Voltura and the grandmother of Black Cuervo who is also the leader of the trio)
Carmen Sandiego (Wanted criminal who was offered a good chunk of money by Cruella to assit her in the final battle)
Blood War (Notorious hitman for hire, was hired alongside Carmen to support the faction in the final battle)
Assistants/Henchmen/Minions[]
Jasper and Horace (The two bumbling henchmen of Cruella De Vil)
Edgar (The loyal butler of Cruella De Vil)
Kabuki Twins (The female bodyguards of the Penguin)
Joanna (The pet of Percival C. McLeach who obeys her owner orders)
Killer Croc (The nephew of Percival C. McLeach who is a monstrous mutant crocodile and a enforcer of the company)
Killer Moth (A mutant supervillain and a enforcer in the company)
Firefly (A arsonist supervillain and a enforcer of the company)
Lucemon (Leader of the faction and a regent of hell, being the incarnation of Lucifer and represents the sin of Pride.)
Daemon (Co-leader of the faction and represents the sin of Wrath.)
Lilithmon (Lieutenant of the faction and represents the sin of lust.)
Beelzemon (Presents the sin of gluttony.)
Belphemon (Presents the sin of laziness)
Barbamon (Presents the sin of greed, the first is being defeated by Mumm-Ra being vaporized by a fireball.)
Leviamon (Presents the sin of envy, is called in the final battle to dispose of their enemies)
Demigra (A powerful demon sorcerer who is recruited by Lucemon to replace Barbamon as demon lord of greed.)
Shadowmaster (A former champion of the ancient spirits and old rival of Mumm-Ra who is summoned by Demigra to confront his enemies, is destroyed by Rasputin.)
Majin Ozotto (A magical demon summoned by Demigra in the final battle.)
Hirudegarn (An immense demon summoned by Demigra in the final battle.)
Assistants/Henchmen/Minions[]
SkullSatamon
MarineDevimon
LadyDevimon
Tactimon
Blastmon
Lucifer (An illusion created by Lucemon sent to confront Dio.)
Dio Brando (Mass murderer and the co-leader of the faction)
Naraku (Evil samurai and main chief lieutenant of the faction)
Zarama (An ancient dragon god who is summoned by ancient evil spirits to help Mumm-Ra against the Demon Lords, he later reveals himself to be an ancient enemy of the Demon Lords.)
Rasputin (Sorcerer who was sent to hell by a old enemy and now joins Mumm Ra's faction to return into the living world)
Dr. Facilier (Dark magician and the protoge of Rasputin who also seeks to escape hell)
Tex Hex (Outlaw and a enforcer in the faction)
King Haggard (Cruel king and member of the faction)
Queen Dagmar (The young wife of Haggard and member of the faction)
Colonel H. Stinkmeaner
Yellow Devil
Assistants/Henchmen/Minions[]
Imhotep
Soldier Mummie
Baron Dark
Shriek
Dr. Cyborn
Dagger
Aracula
Apep
Typhoeus
Emperor Zombie
Gargoyles
Black Pegasus
Facilier's Shadow
Shadow Demons
Friends on the Other Side (Ancient demons freed by Facilier to help the faction take over hell)
The Red Bull
Independant Villains[]
Zeus (The original ruler of Olympus, got killed by Father)
Duke Ightorn (Evil knight who was killed by Marcus after trasspassing into his territory)
The Bishop (Corrupt priest who was mauled by No Heart)
Cecil Turtle (Trickster turtle, was arrested by Sherrif of Nottingham)
Revolta (Ugly monster witch, was burn to death by Azula)
Grim Creeper
Xox (Mad scientist, was electrocuted by the Professor so he could have a position on Burns' company)
The Coachman (Creepy criminal wanted for his heinous crimes. Got gunned down by Yosemite Sam)
Mombi
Lady Bane
Golobulus
The Phantom of the Opera
Jekyll and Hyde
Tiamat
Katarou
Richard the Warlock
Giant Robot Crab
Viking Chieftain
Eldar
Cameos[]
Emperor Belos (Appears only in a flashback, as the person who send Rasputin and Facilier into Hell)
Norman Osborn (Ceo of Oscorp and Cruella's new business partner. Appears only at the end of the first war)
Cronus (God of Titans who appears in the ending of the first war, finally escaping his prison and ready to get revenge on the ones who defeated him)
Brainiac (Artifiial inteligent who appears in the ending picking ups the bodies of Freezer and Cooler)
Mok Swagger (Occult rockstar who appears in the ending of the first war, finally ready to start with his own evil plans)