Across
- 3. Ruler of the Candy Kingdom and scientist
- 6. Female version of Finn from Ice King's fan fiction
- 7. Wish master who exists in the Time Room
- 10. Finn's magical shape-shifting dog brother
- 12. Cosmic entity and former form of Finn's father
- 15. Villainous Candy Elemental from the past
- 17. Human boy and main hero with a big heart
- 18. Grim reaper who appears multiple times
- 19. Marceline’s powerful demon dad
- 20. Hidden in nearly every episode as an Easter egg
- 22. Screechy and unstable lemon-headed ruler
- 23. Vampire queen and bass-playing rockstar
Down
- 1. Long-running fan theory involving Ice King
- 2. Dramatic floating royal who says "Lump off!"
- 4. Female version of Jake from Ice King's fan fiction
- 5. Rainbow unicorn who speaks Korean
- 6. Fire Kingdom royalty and Finn’s ex
- 8. Eccentric wizard obsessed with capturing princesses
- 9. Living video game console and loyal friend
- 11. Song by Marceline from Stakes miniseries
- 13. Home base of Finn and Jake
- 14. Loyal Candy Kingdom citizen made of dough
- 16. Ice King’s mischievous penguin
- 21. Princess Bubblegum’s full royal name