One Piece (Series & Plot)

Theories under this category are related to the main plot and the series as a whole.

Top Theories/Speculations

  1. Theory Ancient Weapons: Astronomy, The real source
    Moons of Pluto, Uranus and Neptune are the inspiration for Ancient Weapons - by CAMUNAI
    Updated: Aug 31, 2017
  2. Theory Journey to Uranus :Winged Race
    4th Ancient Weapon -Devil fruits origins & Secret of Yami Yami no mi - by Dave
    Updated: Mar 28, 2017
  3. Theory Fairy chess in Totland's arc and what could await us (plus Harry potter and Alice)
    Conections between chess games,the current and future arc - by CAMUNAI
    Updated: Jul 15, 2017
  4. Theory Will of D -2 :Truth of Mariejois
    Darkness of World Govt - by Dave
    Updated: Jun 12, 2017
  5. Theory Elbaf, Enel and the Norse Mythology
    Connecting the Norse Mythology with the series (857+). - by Aloe Vera
    Updated: May 11, 2017

View All Featured Theories & Speculations

  1. Theory Elbaf, Enel and the Norse Mythology

    Connecting the Norse Mythology with the series (857+).
  2. Theory Dragon, His fruit is...?

    What the evidence says concerning Dragon's fruit type
  3. Theory The Extraterrestrial Origins Of The Ancient Kingdom & Celestial Dragons Revealed (Part 1)

    I believe that the Ancient Kingdom & 20 Kings both originated from the moon, "Fairy Vearth". Part 1.
  4. Speculation The Echo Of The Pirate King - The Man Roger Is Waiting For

    Roger left behind his voice on Raftel for Luffy to hear.
  5. Theory Journey to Uranus :Winged Race

    4th Ancient Weapon -Devil fruits origins & Secret of Yami Yami no mi
  1. Theories & speculations are being shown from all child categories.
  2. Name Is C
    5/5, 1 rating
  3. Rej Discussions
    3.5/5, 4 ratings
  4. Rej Discussions
    0/5, 0 ratings
  5. Wolfram87
    3.8/5, 5 ratings
  6. Nessos
    4.66667/5, 9 ratings
  7. Sk1p1o
    4.5/5, 2 ratings
  8. King of beasts kaido
    4/5, 1 rating
  9. Shale
    0/5, 0 ratings
  10. Steins;Gate

    Theory The Concept/Schema of Logia-Powers

    Why are specific powers made into logia-powers? Explanation of the background & outlook into future.
    4/5, 2 ratings
  11. galaxyvita

    Speculation What are devil fruits?

    Are devil fruits made by putting haki into normal fruit?
    0/5, 0 ratings
    Updated:
    Oct 11, 2017
  12. Wilsane
    1.66667/5, 3 ratings
    Updated:
    Oct 10, 2017
  13. smoke.choke
    1/5, 1 rating
    Updated:
    Oct 9, 2017
  14. Tokiro Oumaga

    Theory Special but not Unique - Other Special Paramecia

    If Special Paramecia is its own category, there must be more of them, and Oda's probably shown a few
    5/5, 8 ratings
    Updated:
    Oct 9, 2017
  15. heliozen
    4.33333/5, 3 ratings
    Updated:
    Oct 8, 2017
  16. Donal D. Trump
    4/5, 2 ratings
    Updated:
    Oct 8, 2017
  17. Rej Discussions
    4/5, 1 rating
    Updated:
    Oct 8, 2017
  18. King of beasts kaido
    4.4/5, 5 ratings
    Updated:
    Oct 6, 2017
  19. Tokiro Oumaga

    Speculation Aquatic Zoans - Exploring the Depths

    Devil Fruit users can't swim, so there's no point in an aquatic Zoan Fruit, right?
    4.5/5, 6 ratings
    Updated:
    Oct 6, 2017
  20. U-zuki796
    4.33333/5, 3 ratings
    Updated:
    Oct 3, 2017
  21. Tartan Owl
    5/5, 1 rating
    Updated:
    Oct 2, 2017
  22. thabo Motaung

    Theory Consequence of knocking out big mom and how Pedro might come back

    Big mom souls what will happen to them that she has extracted for all this time
    4.5/5, 4 ratings
    Updated:
    Oct 2, 2017
  23. Salamander Siz
    3.5/5, 2 ratings
    Updated:
    Oct 2, 2017
  24. VergoManiac
    4.85714/5, 7 ratings
    Updated:
    Oct 1, 2017
  25. Ma_D._Monk

    Theory Momonosuke's Power Boost

    How Momo will become strong enough to help in Wano.
    3/5, 6 ratings
    Updated:
    Oct 1, 2017
  26. TheForbiddenFruit
    2/5, 1 rating
    Updated:
    Sep 30, 2017
  27. FelliTraydor

    Speculation Luffy eats Sanji's cake to defeat Katakuri

    How the arc ends with BM gone, Luffy and Sanji shining, while keeping their powers realisitic
    3.6/5, 5 ratings
    Updated:
    Sep 30, 2017
  28. animelover421
    4/5, 1 rating
    Updated:
    Sep 29, 2017
  29. Donal D. Trump
    0/5, 0 ratings
    Updated:
    Sep 27, 2017
  30. Nessos

    Theory Devil Fruits Will, the Will of the Sea Devils!

    An explanation for how the Will of D could live on. DF user inherit the will of all previous owner!
    4.76923/5, 13 ratings
    Updated:
    Sep 27, 2017
  31. VergoManiac
    2/5, 2 ratings
    Updated:
    Sep 26, 2017
  32. King of beasts kaido
    2/5, 4 ratings
    Updated:
    Sep 25, 2017
  33. King of beasts kaido
    3/5, 1 rating
    Updated:
    Sep 24, 2017
  34. senjubeans
    3.5/5, 2 ratings
    Updated:
    Sep 23, 2017
  35. yond

    Theory Bringing the Storm: Monkey D. Dragon

    Is Dragon really a Devil Fruit ability user? Mythology says otherwise...
    4.85714/5, 7 ratings
    Updated:
    Sep 23, 2017
  36. King of beasts kaido
    3.66667/5, 3 ratings
    Updated:
    Sep 22, 2017
  37. Tokiro Oumaga

    Theory What Makes a Human - Models of the Human-Human Fruit

    We've already seen two models for the Human-Human Fruit, but could there be more? Genetics says yes.
    5/5, 4 ratings
    Updated:
    Sep 22, 2017
  38. XStar
    3/5, 1 rating
    Updated:
    Sep 20, 2017
  39. mad monk
    3.33333/5, 3 ratings
    Updated:
    Sep 19, 2017
  40. CAMUNAI

    Theory Devil fruits´ functioning: Pure physics

    Why do users drown? Blackbeard, awakening. Because physics!
    5/5, 13 ratings
    Updated:
    Sep 30, 2017
  41. Tokiro Oumaga

    Theory Fight or Flight - The Birdfolk's Strength

    If Big News Morgans, a bird-man, can't fly, then what can he do?
    5/5, 6 ratings
    Updated:
    Sep 23, 2017