EoS Damage Calculator

(Move)
Base power
Type
Category
Max PP
Accuracy 1Base accuracy for the first hit/miss roll performed for all moves
Accuracy 2Base accuracy for the second hit/miss roll, which is only performed for (most) offensive moves
StrikesNumber of strikes. Note that this calculator reports the damage computed for a single strike of the selected move.
Crit rate
Special notes

Message type The type of message reported in the dungeon log
Type matchup Composite type matchup as determined by the type matchups for each of the defender's types. This is probably only used for the message.
Move type The effective type of the move, factoring in type-modifying effects such as Normalize
Move category The move category. This is just copied straight from the game's move tables, without modification.
Critical hit
Full type immunity Whether damage was negated fully due to move typing by Flash Fire, Levitate, or Magnet Rise. This only applies to negation during the damage calculation step, and doesn't include things such as Water Absorb, where damage is still calculated for healing purposes.
No damage The game sets this at various points to indicate that no damage should be dealt, such as when the move misses or is negated by certain abilities like Water Absorb. It's checked at the very end and overrides any other damage calculation results.

Offensive stat stage
Defensive stat stage
Offensive stat
Defensive stat
Offense value The modified offense value used to compute the "AT" and "FLV" values (see below), prior to being clamped between 0 and 999
Defense value The modified defense value used to compute the "DEF" and "FLV" values (see below)
AT The offense value (clamped between 0 and 999) plus the modified move power value. "AT" comes from the game's debug messages.
DEF The defense value, unmodified. "DEF" comes from the game's debug messages.
FLV The attacker's level plus (offense - defense)/8. "FLV" comes from the game's debug messages. Perhaps it stands for "effective level"?
Base damage The base damage calculated before multipliers. Ignoring minor details around rounding, truncation, and clamping, this is: (153/256)AT - DEF/2 + 50ln(10*FLV + 500) - 311 For enemy attacks, a multiplier of 64/85 is also applied.
Static multiplier The "static" part of the multiplier applied to the base damage, not counting an additional random multiplier applied later. This includes things like move-specific multipliers, Me First, Reckless, and Iron Fist. Things like STAB, type-advantage multipliers, etc. are part of a "dynamic" multiplier that isn't included here.
Damage The damage calculated before random variance is applied
Random multiplier The "damage roll" multiplier, applied to the calculated damage to create random variation	% - %

Item attack modifier The net number of attack boosts to an attacker due to a Power Band or Munch Belt. It seems like there's a bug in the code; aura bows do not contribute to this field.
Item special attack modifier The net number of special attack boosts to an attacker due to a Special Band, Munch Belt, or aura bow. It seems like there's a bug in the code; physical attack boosts from aura bows also contribute to this field.
Item defense modifier The net number of defense boosts to a defender due to a Def Scarf or aura bow. It seems like there's a bug in the code; special defense boosts from aura bows also contribute to this field.
Item special defense modifier The net number of special defense boosts to a defender due to a Zinc Band. It seems like there's a bug in the code; aura bows do not contribute to this field.
Ability offense modifier The net number of offense boosts to an attacker due to Download, Rivalry, Flower Gift, and Solar Power
Ability defense modifier The net number of defense boosts to a defender due to Flower Gift
IQ skill offense modifier The net number of offense boosts to an attacker due to Aggressor, Defender, and Practice Swinger
IQ skill defense modifier The net number of defense boosts to a defender due to Counter Basher, Aggressor, and Defender
Scope Lens/Sharpshooter Whether or not Scope Lens or Sharpshooter boosted the critical hit rate of a move
Patsy Band Whether or not the Patsy Band boosted the critical hit rate of a move
Half physical damage Whether or not Reflect or the "Halved physical damage" exclusive item effect halved the damage from a physical move
Half special damage Whether or not Light Screen or the "Halved special damage" exclusive item effect halved the damage from a special move
Focus Energy Whether or not the Enhanced critical-hit rate status maxed out the critical hit rate of a move
Type-Advantage Master Whether or not Type-Advantage Master boosted the critical hit rate of a move
Cloudy Whether or not a non-Normal-type move was dampened by Cloudy weather
Rain Whether or not a Fire or Water move was affected by Rainy weather
Sunny Whether or not a Fire or Water move was affected by Sunny weather
Thick Fat/Heatproof Whether or a Fire move was dampened by Thick Fat or Heatproof
Flash Fire Whether or not Flash Fire was activated at some point for Fire immunity
Levitate Whether or not Levitate was activated at some point for Ground immunity
Overgrow Whether or not a Grass move was boosted by Overgrow
Swarm Whether or not a Bug move was boosted by Swarm
Blaze/Dry Skin Whether or not a Fire move was boosted by either Blaze or Dry Skin
Scrappy Whether or not Scrappy was activated at some point to bypass immunity
Super Luck Whether or not Super Luck boosted the critical hit rate for a move
Sniper Whether or not Sniper boosted the critical hit damage multiplier for a move
STAB Whether or not STAB was activated for a move
Mud Sport/Fog Whether or not an Electric move was dampened by either Mud Sport or Fog
Water Sport Whether or not Water Sport was activated by a Fire move
Charge Whether or not Charge was activated by an Electric move
Ghost immunity Whether or not a Ghost type's immunity to Normal/Fighting was activated at some point
Skull Bash Whether or not a defender took less damage due to the Charging Skull Bash status

(Species)
Gender
Type 1
Type 2
Ability 1
Ability 2
Weight Controls damage multipliers for Low Kick and Grass Knot

About

This is an attempt to faithfully reproduce the way damage is calculated in Explorers of Sky. For a more in-depth explanation, see the accompanying writeup.

The calculator uses modern web features (WebAssembly/Web Components), so if it doesn't run, try updating your browser.

Source code is on GitHub. Feel free to open issues or pull requests as needed, or message u/UsernameFodder on Reddit.

PMD Explorers of Sky Damage Calculator

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