Verified · Reg M-C

The numbers agree
with Smogon.

Every damage roll ChampDex shows gets diffed against @smogon/calc every day. STAB, types, weather, terrain, abilities, items — all of it. If we disagree, it's documented with a source.

●last_verified2026-10-25 23:41 UTC|smogon_pin2d486b5
96%
Match rate · 563/586
● Zero unexpected drift
586
Total scenarios
96%
Match rate
23
Known diffs
0
Unexpected
02

Coverage

105
Damage-relevant abilities
Each one ported from Bulbapedia or Serebii with a source link in ability-effects.ts
754
Move flags synced
contact · punch · pulse · bite · slicing · sound · wind · bullet · recoil — updated 2026-10-27
2d486b5
Reference calc pin
Smogon master build, checked against our parity suite every day
03

KO odds

The OHKO, 2HKO and 3HKO odds on every result card are held to Smogon's getKOChance the same way: entry hazards, end-of-turn chip and healing, the target's current HP, and uses in a row.

58/58
KO verdicts identical
Leftovers, sand, poison, Toxic, Leech Seed, Salt Cure, binding moves, hazards and the HP slider, each at several attack stages
48/48
Later-use rows identical
A second and third use after the first changed the battle: Draco Meteor's drop, Multiscale, a resist Berry, Stamina, Mummy, Gyro Ball's Speed
10/10
Identical once Smogon is told
Salt Cure, Inferno's burn, a flung Poison Barb and Unburden, which Smogon counts once they're set by hand

What ours counts that Smogon's doesn't

  • A Sitrus or Oran Berry restoring HP once the target falls to half.
  • A Focus Sash or Sturdy leaving the target 1 HP from full, and Disguise taking the first hit.
  • Later uses as the first left the battle: the item Knock Off took, a White Herb spent, the Metronome item's next step.
  • Damage from the HP the last use left: Super Fang, Endeavor and Hard Press.
  • One use for a move that can't go again: Explosion, Fake Out, Fling.
  • What a move leaves on its target by itself: Salt Cure, Inferno's burn, a flung Poison Barb.
  • The turn a move spends charging or recharging: Solar Beam out of the sun, Dig, Hyper Beam.
  • What Counter, Mirror Coat, Metal Burst and Comeuppance hand back, from the hit they answer.

Left out of the comparison, and why

  1. leftovers/knock-off
    Knock Off takes the item with the first use, so the second isn't boosted; Smogon's 2HKO repeats the boosted hit.
  2. fling/poison-barb
    Fling throws the item, so there's no second throw; Smogon's 2HKO and 3HKO repeat it.
04

Documented divergences

These scenarios intentionally produce different numbers from Smogon's reference. Each cites Serebii / Bulbapedia where our reading of Champions behavior beats Smogon's current implementation.

  1. 01
    attacker-ability/Galvanize/extreme-speed
    Smogon's Champions mechanics omit Galvanize from the -ate list; ours applies per Serebii.
    ours 28–33·theirs 23–28
  2. 02
    attacker-ability/Overgrow/bullet-seed
    Multi-hit reporting style differs (Bullet Seed 2-5 hits).
    ours 6–20·theirs 9–12
  3. 03
    defender-ability/Ice Scales/dark-pulse
    Smogon omits Ice Scales (~0.5 special) in its Champions mechanics file; ours applies per Serebii.
    ours 19–23·theirs 39–46
  4. 04
    defender-ability/Shadow Shield/extreme-speed
    Smogon omits Shadow Shield (≡ Multiscale) in its Champions mechanics; ours applies.
    ours 18–21·theirs 36–43
  5. 05
    item/Yache Berry/icicle-spear
    Multi-hit reporting style differs.
    ours 66–252·theirs 110–140
  6. 06
    multihit/bullet-seed
    Multi-hit reporting style differs: ours shows min(1)-max(5) range, Smogon shows deterministic 3.
    ours 26–80·theirs 39–48
  7. 07
    multihit/icicle-spear
    Multi-hit reporting style differs: ours shows min(1)-max(5) range, Smogon shows deterministic 3.
    ours 104–320·theirs 156–192
  8. 08
    last-respects/3-fallen
    Smogon's Champions mechanics omit Last Respects' fallen-ally scaling; ours adds +50 BP per fallen ally per Serebii.
    ours 228–270·theirs 60–72
  9. 09
    assurance/target-damaged
    Smogon's Assurance case only fires for the Parental Bond child hit; ours doubles on any already-damaged target per Serebii.
    ours 123–145·theirs 61–73
  10. 10
    tera/defender-resist
    Smogon's Champions calc omits tera; ours swaps defensive types per mainline rules.
    ours 38–45·theirs 76–91
  11. 11
    lash-out/lowered
    Smogon's Lash Out check only counts raised stats, so it never doubles; ours doubles after a stat drop that turn, per Serebii.
    ours 154–183·theirs 78–93
  12. 12
    item/iron-ball-fire-flying
    Smogon makes a grounded Flying type a flat ×1 target; the game only removes the Flying immunity, so Ground still hits its Fire type ×2.
    ours 174–206·theirs 87–103
  13. 13
    item/iron-ball-levitate
    Smogon's Champions file doesn't let an Iron Ball ground a Levitate user (its main-series file does); ours does, as the item says.
    ours 212–252·theirs 0–0
  14. 14
    item/normal-gem-double-hit
    A Gem is spent on the first hit, so Double Hit's second hit isn't boosted; Smogon's Champions file boosts both.
    ours 63–76·theirs 72–86
  15. 15
    wonder-room/parental-bond
    Smogon undoes Wonder Room for Parental Bond's second strike (it swaps the stats twice); ours keeps the room up for both hits.
    ours 89–108·theirs 101–121
  16. 16
    fling/other-mega-stone
    Smogon's fling table has no Mega Stones, so its Fling does nothing; the game throws one for 80 power (ours reads the item data).
    ours 61–73·theirs 0–0
  17. 17
    parental-bond/dig
    Smogon gives Parental Bond a second strike on Dig; a two-turn move only hits once with it.
    ours 52–62·theirs 64–77
  18. 18
    parental-bond/solar-beam
    Smogon gives Parental Bond a second strike on Solar Beam; a two-turn move only hits once with it.
    ours 35–42·theirs 43–52
  19. 19
    combo-atk/Overgrow/venusaur/bullet-seed
    Multi-hit reporting style differs.
    ours 6–20·theirs 9–12
  20. 20
    combo-def/Prism Armor/play-rough
    Smogon's Champions calc doesn't check Prism Armor; ours applies ×0.75 on SE.
    ours 60–72·theirs 80–96
  21. 21
    combo-def/Ice Scales/dark-pulse
    Smogon omits Ice Scales; ours applies per Serebii.
    ours 19–23·theirs 39–46
  22. 22
    combo-def/Shadow Shield/extreme-speed
    Smogon omits Shadow Shield.
    ours 18–21·theirs 36–43
  23. 23
    combo-def/Storm Drain/waterfall
    Smogon's Champions calc uses Storm Drain only to redirect; ours treats as type immunity (mainline dual-effect).
    ours 0–0·theirs 18–21
05

How it stays current

●dailyEvery day we rebuild Smogon's damage-calc from master and re-run the parity suite against it. When Smogon models something our calc doesn't, the new build waits until ours does too.
last_sync=2026-10-26 12:20 UTC
●dailyMove flags come from Serebii's Champions attackdex (contact, sound, punch, biting, slicing, bullet, wind), so Champions' own changes count, with Pokémon Showdown's data for pulse and recoil. Refreshed twice a day.
last_refresh=2026-10-27 00:24 UTC
●cont.A calc change only ships when the parity suite finds no unexpected disagreement with Smogon's reference.
See a number you don't trust?

If our calc disagrees with what you see in-game, that's a bug we want to fix. Not something to argue about.

Report a mismatch
← back to calcsmogon/champions.ts

Pokémon Champions Damage Calculator

ChampDex is a free Pokémon Champions damage calculator built for the Reg M-C format. It runs the exact Champions damage formula, Stat Points instead of EVs, Level 50, Mega Evolution, weather, items, and spread moves, and it shows every modifier so you can trust the KO range. The numbers are parity-verified against Smogon's calculator every day.

Frequently asked questions

How do I calculate damage in Pokemon Champions?
Pokemon Champions uses a stat-point system instead of traditional EVs. Damage depends on the attacker's level (always 50), its Attack or Special Attack stat, the move's base power, and the defender's matching defense, multiplied by STAB, type effectiveness, weather, crit, and spread modifiers. The ChampDex calculator runs the full Champions-accurate formula so you trust every KO range in Reg M-C.
What is STAB in Pokemon Champions?
STAB (Same-Type Attack Bonus) is a 1.5x multiplier applied when a Pokemon uses a move of a type matching one of its own types. Adaptability makes it 2x. The calculator applies STAB automatically based on the attacker's types.
Does Pokemon Champions use EVs or stat points?
Pokemon Champions uses a stat-point system with a 66-point total budget and a 32-point per-stat cap. Each stat point adds 1 to the final stat at Level 50. The ChampDex calculator supports stat points directly, and the EV Converter tool translates Smogon EV spreads into Champions equivalents using the official 4-EVs-for-the-first-SP / 8-EVs-per-extra-SP conversion rule.
Is this damage calculator accurate for Champions tournaments?
Yes. The ChampDex calculator uses the exact damage formula verified from Serebii and Bulbapedia for Reg M-C, the current Champions format. It handles STAB, weather (Rain/Sun/Sand/Snow), crit, spread-move reduction (0.75x for Doubles multi-target moves), and stat stages. All modifiers are shown in the breakdown so you can verify every step.
Does the calculator support Mega Evolution?
Yes. Mega Evolution is the only battle gimmick legal in Reg M-C, and the calc fully supports Mega forms — switch to Mega Charizard Y, Mega Gardevoir, or any other Champions-legal Mega and the boosted stats, changed ability, and updated typing all apply automatically.
Does the calculator support Terastallization?
Not yet. Terastallization isn't legal in Reg M-C (Champions is Mega-only), so the Tera controls are hidden to avoid producing damage numbers the game can't reproduce. When Tera becomes legal in a future regulation, the damage formula already supports it and the UI will unhide automatically.
Is the Pokemon Champions calculator free?
Yes. The ChampDex damage calculator is free, requires no login or account, has zero paywalls, and no ads. All features are unlocked for everyone.