It's called "Monster" - they weren't kidding!
Anime and manga creators have created a wide variety of villains, and some of them, like the ones on this page, are utterly horrific in their cruelty and depravity. The following series/franchises have their own pages:
- Ace Attorney
- Akame Ga Kill
- Berserk
- Bleach
- Code Geass
- Cutey Honey
- Dance in the Vampire Bund
- Danganronpa
- Devilman
- Devil May Cry
- Digimon
- Dragon Ball
- Edens Zero
- Fairy Tail
- Fist of the North Star
- Flame of Recca
- Fullmetal Alchemist
- Godzilla
- Gundam
- Hellsing
- Inuyasha
- JoJo's Bizarre Adventure
- Kingdom Hearts
- Legend of Galactic Heroes
- Legend of Zelda
- Lupin III
- Marvel Anime
- Mazinger Z
- Mega Man
- Metroid
- My Hero Academia
- Naruto
- Nasuverse
- O-Parts Hunter (aka. 666 Satan)
- One Piece
- Pokémon
- Pretty Cure
- Resident Evil
- Rurouni Kenshin
- Sailor Moon
- Science Adventure Series
- Sherlock Holmes
- Street Fighter
- Sword Art Online
- Transformers
- When They Cry
- Yu Yu Hakusho
- Yu-Gi-Oh