DexDB.io

Pokémon Champions mechanics: what’s known

DexDB knows of no public measurement on build 1.2.2 (Oct 7). Each row shows its date, and in-game text has been wrong before, as with Leech Seed.

72 rules, by how well they are known

Settled6An official notice, or a count on this build.
Reported29A named report or an older count. Nothing on this build.
Disputed14Sources disagree.
Unknown23No game evidence. DexDB plays the engine’s rule.

Every rule

Showing Settled · 6

Showing Reported · 29

Showing Disputed · 14

Showing Unknown · 23

  1. Battle timers

    A battle gets 20 minutes in total, 7 for each player, 45 seconds per move and 90 seconds to pick.

    SettledOfficial noticeread Nov 1

    Details

  2. Out of time in an online competition

    If the total battle time runs out, the battle ends and the result is decided by the Pokémon left and their HP.

    SettledOfficial noticeread Nov 1

    Details

  3. One Mega Evolution a battle

    A side can Mega Evolve once per battle, and only a Pokémon holding its Mega Stone.

    SettledOfficial noticeread Nov 1

    Details

  4. Leech Seed drains 1/8

    Leech Seed takes 1/8 of the seeded Pokémon's max HP each turn. The game's text said 1/16 and was wrong.

    SettledOfficial noticeas of Apr 23

    Details

  5. Held-item Speed in ability order

    When abilities trigger in Speed order, a Speed change from a held item now counts. It was fixed in Ver. 1.0.3.

    SettledOfficial noticeas of Apr 23

    Details
    • Sources
    • What DexDB doesPartly: the sim runs the engine's rule; the calc has no entry order
    • NoteBefore the fix, #163 (Apr 15) saw Choice Scarf ignored for the order of entry abilities after double KOs, while Tailwind and Trick Room were respected. Nobody has re-counted it since.
    • Game version1.0.3
    • ReadNov 1, 2026

  6. Unnerve fix

    Unnerve now stops Berry eating for Pokémon with certain abilities, which it did not before Ver. 1.0.3.

    SettledOfficial noticeas of Apr 23

    Details

  7. Tailwind lasts 4 turns

    Tailwind doubles its side's Speed for 4 turns.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  8. Trick Room lasts 5 turns

    Trick Room reverses the Speed order for 5 turns.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  9. Protect in a row drops to one third

    Using Protect and its family in a row cuts the chance to work to one third each time.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  10. Weather abilities last 5 turns

    Drizzle, Drought, Sand Stream and Snow Warning set their weather for 5 turns.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  11. Level 50 and Stat Points

    Battles are at level 50 as far as reported; no notice states it. A Pokémon has 66 Stat Points, at most 32 in one stat.

    ReportedA reportEngine (Showdown’s mod)read Nov 2

    Details

  12. Sleep costs 1 or 2 moves

    Sleep costs 1 or 2 moves: a one in three chance to wake on the second turn, certain on the third.

    ReportedA reportEngine (Showdown’s mod)read Nov 2

    Details

  13. Freeze thaws 1 turn in 4

    A frozen Pokémon thaws 1 turn in 4, and always by the third turn.

    ReportedA reportEngine (Showdown’s mod)read Nov 2

    Details

  14. Full paralysis is 1 in 8

    A paralysed Pokémon is stopped 1 turn in 8, not 1 in 4.

    ReportedA reportEngine (Showdown’s mod)read Nov 2

    Details

  15. No Trick Room overflow

    Trick Room has no Speed overflow above 1809: very fast Pokémon still move first.

    ReportedA reportEngine (Showdown’s mod)as of Apr 9

    Details

  16. Item roster

    Champions has 57 held items, 28 Berries and 81 Mega Stones. Choice Band, Choice Specs, Assault Vest and Booster Energy are not in it.

    ReportedA reportEngine (Showdown’s mod)read Nov 1

    Details

  17. PP formula and cap

    A move's PP is (base PP / 5 + 1) x 4, with base PP over 20 counted as 20.

    • Base PP, then PP5→8 · 10→12 · 15→16 · 20+→20

    ReportedOfficial noticeA reportEngine (Showdown’s mod)as of Sep 9

    Details

  18. Disguise and multi-hit moves

    Disguise breaks on the first hit of a multi-hit move, and the later hits are normal.

    ReportedA reportEngine (Showdown’s mod)as of Sep 7

    Details

  19. White Herb with Parting Shot

    White Herb now cures the drops from Parting Shot, on both sides.

    ReportedA reportEngine (Showdown’s mod)as of Sep 7

    Details

  20. Mega Sol: holder's Water moves halved

    A Pokémon with Mega Sol hits with Water moves as if the sun were up: halved.

    ReportedA player’s countA reportEngine (Showdown’s mod)as of Apr 17

    Details

  21. Mega Sol on the defender keeps the boost

    A Pokémon holding Mega Sol keeps its own Sand or Snow defence boost when it is hit.

    ReportedA player’s countEngine (Showdown’s mod)as of Apr 17

    Details

  22. Mega Sol attacking into Sand or Snow

    A Pokémon with Mega Sol attacking ignores the target's Sand or Snow defence boost. No clean test exists.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  23. Mega Sol: Thunder and Hurricane at 50%

    With Mega Sol, Thunder and Hurricane have 50% accuracy.

    ReportedA player’s countEngine (Showdown’s mod)as of Apr 18

    Details

  24. Mega Sol: Electro Shot charges

    Electro Shot still takes a charge turn for a Pokémon with Mega Sol, even in rain.

    ReportedA reportEngine (Showdown’s mod)as of Sep 19

    Details

  25. Mega Sol: Growth raises two stages

    Growth raises Attack and Sp. Atk by 2 for a Pokémon with Mega Sol.

    ReportedA reportEngine (Showdown’s mod)as of Sep 7

    Details

  26. Eject Button and pivot moves

    Eject Button no longer stops U-turn or Volt Switch from switching their user out.

    ReportedA reportEngine (Showdown’s mod)as of Sep 9

    Details

  27. Fake Out is barred after the first turn

    Fake Out can't be chosen after its user's first turn out.

    ReportedA reportEngine (Showdown’s mod)as of Apr 9

    Details

  28. Critical hits are about 1 in 24

    A critical hit lands about 1 time in 24.

    ReportedA player’s countEngine (Showdown’s mod)as of Apr 19

    Details

  29. Early Bird and Rest

    Rest is unchanged. With Early Bird, sleep from Rest lasted 1 turn in one report.

    ReportedA reportEngine (Showdown’s mod)as of Apr 12

    Details

  30. Rage Powder is a powder move

    Rage Powder counts as a powder move, so Grass types ignore it. Only its displayed flag changed.

    ReportedA reportEngine (Showdown’s mod)as of Sep 23

    Details

  31. Stalwart ignores redirection only

    Stalwart ignores moves and abilities that draw attacks to another target.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  32. A Mega stays Mega after fainting

    A Pokémon that Mega Evolved stays Mega after it faints.

    ReportedA reportEngine (Showdown’s mod)as of Apr 8

    Details

  33. Mega Evolution order

    A Mega Evolution comes before moves, ordered by Speed before it Mega Evolves, as far as players' tests show.

    ReportedA player’s countA reportEngine (Showdown’s mod)as of Apr 9

    Details

  34. Priority brackets

    A higher priority bracket moves first: Helping Hand +5; Protect, Detect, Endure +4; Fake Out and the guards +3; Trick Room -7.

    ReportedA reportEngine (Showdown’s mod)as of Apr 9

    Details

  35. Stance Change

    Aegislash turns to Blade Forme when it attacks. King's Shield turns it back to Shield Forme.

    ReportedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  36. Fire Mane: Attack or power

    Fire Mane is x1.5 on Attack in the engine. One article concludes it acts on power instead.

    DisputedA reportEngine (Showdown’s mod)as of Oct 12

    Details

  37. Damage roll set

    The engine rolls 16 values from 85% to 100%. Counts in the game disagree with it and with each other.

    DisputedA player’s countA reportEngine (Showdown’s mod)as of Jun 21

    Details

  38. Speed Swap and Mega Evolution

    One stream showed a Mega keeping the Speed it got from Speed Swap. The engine resets it.

    DisputedA reportEngine (Showdown’s mod)as of Apr 15

    Details

  39. Dragon Tail and Sitrus Berry

    One report showed the target forced out by Dragon Tail before its Sitrus Berry ate. The engine eats first.

    DisputedA reportEngine (Showdown’s mod)as of Sep 23

    Details

  40. Life Orb and Make It Rain

    Life Orb's recoil comes before Make It Rain's Sp. Atk drop in one report. The engine puts it after.

    DisputedA reportEngine (Showdown’s mod)as of Jun 20

    Details

  41. Grassy Terrain heal order

    Grassy Terrain heals and Leftovers: in the engine, by Speed; one report says by position on the field.

    DisputedA reportEngine (Showdown’s mod)as of Jun 28

    Details

  42. Replacement order after a double KO

    After a double KO, the engine lands the faster side's new Pokémon first. A report says order follows who picked first.

    DisputedA reportEngine (Showdown’s mod)as of Sep 22

    Details

  43. Darkest Lariat and Sacred Sword on evasion

    Darkest Lariat and Sacred Sword ignore the target's evasion in the engine. One report says they no longer do.

    DisputedA reportEngine (Showdown’s mod)as of May 2

    Details

  44. Huge Power: Attack or power

    Huge Power doubles Attack in the engine. A posted text list says it doubles the power of physical moves.

    DisputedA reportEngine (Showdown’s mod)as of Apr 10

    Details

  45. Timer draw on the ladder

    If time runs out on the ladder, the game may call a draw. For online competitions the result is decided by the Pokémon left and their HP.

    DisputedOfficial noticeA reportas of Apr 9

    Details

  46. Lightning Rod with Encore

    Lightning Rod may not redirect correctly for an Encored Pokémon. The engine has no such bug.

    DisputedOfficial noticeA reportEngine (Showdown’s mod)read Nov 2

    Details

  47. Last Respects damage

    Last Respects adds 50 power for each fainted ally. One 155-damage hit seen in play fits no combination.

    DisputedA reportas of Sep 14

    Details

  48. Stomping Tantrum after a half-failed turn

    Stomping Tantrum was not doubled after a turn when Rock Slide was blocked by one foe's Protect and missed the other. The engine doubles it.

    DisputedA reportEngine (Showdown’s mod)as of May 7

    Details

  49. Two Megas on one turn

    When both sides Mega Evolve, the order may be wrong: a known issue, no fix listed.

    DisputedOfficial noticeA player’s countA reportEngine (Showdown’s mod)as of Apr 9

    Details

  50. Weather when its setter leaves

    Weather from an ability runs its 5 turns from when it was set, even if its setter leaves. Only primal weathers end on leaving, and they are not legal.

    UnknownEngine (Showdown’s mod)read Nov 2

    Details

  51. Weather with its rock

    A Pokémon holding the weather's rock makes the weather it sets last 8 turns.

    UnknownEngine (Showdown’s mod)read Nov 2

    Details

  52. Mega into the same weather

    A Mega Evolving into the weather already up does not refresh it.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  53. Weather count under Cloud Nine

    Weather keeps counting down while Cloud Nine switches its effects off.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  54. Which Megas set weather

    Mega Charizard Y brings sun, Mega Tyranitar sand, Mega Abomasnow and Mega Froslass snow, Mega Raichu X Electric Terrain. None brings rain.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  55. Mega Sol: holder's Fire moves up

    A Pokémon with Mega Sol hits with Fire moves at x1.5, as in sun.

    UnknownEngine (Showdown’s mod)read Nov 2

    Details

  56. Terrain lasts 5 turns

    A terrain lasts 5 turns, 8 with Terrain Extender, and only affects grounded Pokémon.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  57. Speed ties

    When two Pokémon have the same Speed, the order is random. Whether it is a fair coin, and per turn or per action, is not known.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  58. Speed changes mid-turn

    A Speed change mid-turn changes who moves next.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  59. A switch against a Mega

    Whether a switch goes before a Mega Evolution on the same turn.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  60. A Mega's Speed on the turn it Mega Evolves

    The new Speed applies the same turn.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  61. End-of-turn order

    End-of-turn effects run in a fixed order, each by Speed: weather, Wish, Grassy heal and Leftovers, Leech Seed, poison and burn, then side and field endings.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  62. Spread damage with a Protecting or immune partner

    A spread move keeps its x0.75 when a target is Protecting or immune, and when one foe is left with a Flying ally.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  63. Ally Switch repeat rate

    Ally Switch fails more often each time it is used in a row; the rate has not been counted.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  64. Confusion rates

    Confusion hits itself about one time in three and lasts 1 to 4 tries.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  65. Multi-hit rates

    Two-to-five hit moves hit 2, 3, 4 and 5 times at 35%, 35%, 15% and 15%.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  66. Quick Claw and Quick Draw rates

    Quick Claw lets its holder move first about 20% of the time, Quick Draw about 30%.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  67. Encore and priority

    How Encore changes a move's priority has not been measured. One report says that ability and terrain priority update after Encore.

    UnknownA reportEngine (Showdown’s mod)as of Sep 19

    Details

  68. Snipe Shot after a slot change

    Snipe Shot targets the slot after a Parting Shot switch.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  69. Zoroark entry order

    Whether Zoroark entering at the end of a turn changes the entry order.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  70. Who stops, turns or answers Intimidate

    Clear Body, White Smoke, Hyper Cutter, Inner Focus, Oblivious, Own Tempo and Scrappy stop it. Mirror Armor, Guard Dog, Contrary and Defiant turn it. Competitive and Rattled answer it.

    UnknownEngine (Showdown’s mod)read Nov 1

    Details

  71. What the July to October updates changed

    The July 8, July 17, August 5, September 16 and October 7 updates changed things with no published list.

    UnknownOfficial noticeread Nov 1

    Details

  72. Level in the Mega competition

    The Mega Evolution Battle Competition's notice does not state the Pokémon level.

    UnknownOfficial noticeread Nov 2

    Details

What the words mean

  • SettledAn official notice, or a count on this build.
  • ReportedA named report or an older count. Nothing on this build.
  • DisputedSources disagree.
  • UnknownNo game evidence. DexDB plays the engine’s rule.
  • Official noticeFrom The Pokémon Company or Nintendo.
  • A player’s countA report that states how many tries it rests on.
  • A reportA named post or list, with no sample stated.
  • Engine (Showdown’s mod)Showdown’s Champions mod. It is not the game.

A status never reads better than its source. “As of” is the day a source was posted; “read” is the day DexDB read it, which says nothing about the game. The game’s own text reaches DexDB only through a list a forum member posted, so it counts as a report.

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