It would perhaps not be amiss to point out that he had always tried to be a good dog. He had tried to do all the things his MAN and his WOMAN, and most of all his BOY, had asked or expected of him. He would have died for them, if that had been required. He had never wanted to kill anybody. He had been struck by something, possibly destiny, or fate, or only a degenerative nerve disease called rabies. Free will was not a factor.
~ Stephen King, about how Cujo turned more aggressive and murderous after being bitten by a bat.
Have you ever had someone take your brain and play? Pull you out and stuff something else in? You know what it's like to be unmade?
~ Hawkeye talks about how he was brainwashed by Loki.
Good soldiers follow orders.
~ Tup when initiating his orders early.

Villains who have been the victims of brainwashing and/or possession. Possession means that the host's body was taken over by a demon or other form of evil spirit and brainwashing means that the host was hypnotized, mind controlled, bitten by a rabid animal, etc.. Possessed/Brainwashed characters only count as villains if they spend more time under the influence in the story than they do with their normal personalities and thus are better recognizable in their possessed/brainwashed states (Cynder and Koragg, for example), or if they are villains to begin with and are simply brought down into further depravity by the influence of other evildoers (examples of this particular case being Diabolico and Dhoulmagus). Sometimes, a villain being brainwashed by another villain will end up as a slave to said villain (an example being Shouko Aihara); and other times, if the villain ends up brainwashed, the villain may end up turning to the good side (Carl Hauser and Darth Revan are examples).

Notes

  • Pure Evil villains will NEVER fall under Possessed/Brainwashed as those types of villains are in their normal senses (neither possessed nor brainwashed) and are responsible for their own actions. Regardless of how cruel, sadistic or unnecessary the possessed/brainwashed characters' actions were, it is never completely their fault since they were being controlled by someone else.
    • Even if, in a very rare case, Pure Evil villains had been possessed/brainwashed by someone else (e.g. Yevgeny Borisovitch Volgin was brainwashed by Tretji Rebenok and became Man on Fire; Makuta Teridax was taken over by the Mask of Ultimate Power and thus became a mindless puppet; Brajira of the Messiah had his memories erased by Robogog of the 10-sai and became Buredo-RUN of the Cyborg; the Joker was bitten by Dracula and turned into a vampire until Batman cured him), they should go under Pawns and/or Zombies instead of this category.
    • Additionally, in rarer cases, a villain who is meant to LOOK Pure Evil in a flashback or the legacies of their evil actions can have their Pure Evil status retconned via snapping out of a possessed/brainwashed state and deciding they like their new life better.
  • Also, do not create pages based on this category, for long-time heroes or good people who are only briefly controlled by villains do not count. For example:
    • Ami Onuki (from Hi Hi Puffy AmiYumi) was only possessed by the drumsticks she bought that caused her to be controlled by Crazy Styxx in "Ami Goes Bad".
    • Master Yo (from Yin-Yang Yo!) only drank the drink Carl the Cockroach made that caused him to go on a destructive rampage in "A Case of Evils".
    • Jill Valentine ( from Resident Evil) only turned evil under Albert Wesker's mind control device implanted in her chest, once Chris and Sheva removed it from her she was back to her heroic state.
    • Buzz Lightyear (from Toy Story) was only briefly turned into an evil servant by Lots-o'-Huggin' Bear when he switched him to demo mode.
    • Toothless (from How to train your Dragon) was only turned into a mindless puppet when he was under Drago Bludvist's Bewilderbeast's control, while Hiccup managed to snap him out of it and was able to overcome the Bewilderbeast's Influence.
    • Jenny (from My Life as a Teenage Robot) only turned into a giant hideous monster due to being infected with a microbug by Vexus in "Hostile Makeover", while in "Sister Sledgehammer", she was controlled by a giant robot made from the Cluster drones by Smytus, along with XJs 2-8.
    • Red (from Angry Birds) only transformed into a pig and behaved like one due to being infected with the Chef Pig's potion in "Pig Plot Potion".
    • Calamity (from Valkyrie Crusade) was only transformed into Cajoling Calamity by a Taboo member who controlled her miasma to went out of control. 
    • Missing Predators turned savaged briefly by Dawn Bellwether (from Zootopia) At first were thought to have become savages due to self-instinct, but was due to the Poisonous Flowers called "Night Howlers" that Bellwether had darted them with, therefore, they were never culpable for the latter's crimes.
    • All of the people akumatized by Hawk Moth (from Miraculous Ladybug) had their negative emotions amplified by his akumas and transformed into supervillains temporarily, though some villainous characters which willingly offer to be akumatized to support his goals (like Lila Rossi and Mayura) still count.

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