Villains from Adventure Time Fanfiction. They range from flippant annoyance to World War threatning.
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- Tabuu
- Tartaros
- The Acnologia Cult
- The Barbaric Bandits
- The Birch King
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- The Fire Tribe
- The Frost Tribe
- The Grima Cult
- The Khan Republic
- The Kou Empire
- The Lich
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- The Metal Empire
- The Old One
- The People's Republic of Balbad
- The Shroobs
- The Zeti
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- Tiki Taki Tribe
- Tonga Brahma
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- Tundra the Walrus
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