Hit chance

Hit chance determines the chance that a move will hit.

General Formulas

If the attacker has the Locked On status, the hit chance is set to 100%. Otherwise, if the defender has the Cottoned On status, then the hit chance is set to 0%. When neither status effects are present, the hit chance is

$\text{HitChance}=\{\begin{array}{ll}\frac{\text{MoveAccuracy}+\text{AttackerAccuracy}-100}{\text{DefenderEvasion}},& \text{AttackerAccuracy}>100\\ \frac{\text{MoveAccuracy}\times \text{AttackerAccuracy}}{100\times \text{DefenderEvasion}},& \text{otherwise}\end{array}$

If the hit chance is greater than 1 (100%), the attack has an increased critical hit chance. In general, the accuracy term in the numerator is multiplicative, but if the user has a boosted accuracy stat, the accuracy term instead becomes added based on how large $\text{AttackerAccuracy}$ is compared to the default value of 100.

If the defender and attacker are of the same team, $\text{DefenderEvasion}$is always set to the default value of 100. This only affects hit chance; the critical hit chance still uses the defender's evasion stat even if the defender is on the same team as the attacker.

Accuracy and Evasion

Main article: Stat

Attacker Accuracy

As a consequence of the different equation being used when attacker accuracy goes above 100 (100%), the move's accuracy gets increased by an amount based directly on the attacker's excess accuracy. For example, if the target has an unmodified evasion stat, Hypnotise has a move accuracy of 50%. If the user has Accuracy Up active, the +50% accuracy boost is effectively added to the move accuracy, meaning the move now has an accuracy of 100%. Similarly, Sleep Talk goes from 1% to 51% after accounting for stat stages.

The base values for the accuracy of tapes and characters are 100, so the formula can be simplified as such:

$\text{AttackerAccuracy}=100\times \prod _{\text{m}\in \text{stickers}}\left(\frac{{\text{AccuracyAttribute}}_{\text{m}}+100}{100}\right)\times \text{AccuracyStageMultiplier}$

• $\text{AccuracyAttribute}$ accounts for the Passive: +x% Accuracy and Passive: +% Accuracy per empty slot attributes across all stickers in the tape, which are multiplied together instead of being additive.
• $\text{AccuracyStageMultiplier}$ is the multiplier from all present stat stages that affect accuracy.

Some examples:

• With no attributes present or stat stages in play, attacker accuracy is 100.
• A monster tape with a Passive: +5% Accuracy attribute in their stickers will have $\text{AttackerAccuracy}=100\times 1.05=105$.
• With Accuracy Up, it has a stat stage of +2 so$\text{AccuracyStageMultiplier}=6/4=1.5,$and $\text{AttackerAccuracy}=100\times 1.5=150$.
• With Gambit and a monster tape having a sticker with the Passive: +5% Accuracy attribute a sticker with the Passive: +2% Accuracy per empty slot with 3 empty slots, the total contribution from attributes is $1.05\times (1+0.02\times 3)=1.113$; since Gambit gives a +4 (+100%) stat stage to accuracy, $\text{AccuracyStageMultiplier}=8/4=2$. Combining them all, $\text{AttackerAccuracy}=100\times 1.113\times 2=222$ after rounding down.

Move Accuracy

$\text{MoveAccuracy}=\text{BaseMoveAccuracy}\times \prod _{\text{m}\in \text{stickers}}\left(\frac{{\text{MoveAccuracyAttribute}}_{\text{m}}+100}{100}\right)$

• $\text{MoveAccuracyAttribute}$ accounts for the +x% Move accuracy and +x% Move accuracy per empty slot attributes across all stickers in the tape, which are multiplied together instead of being additive.
• If the user has the Unitarget status, $\text{MoveAccuracy}$ is halved.
• When Fog is in effect and the move's type is not in the list of exempted moves, $\text{MoveAccuracy}$ is set to 0.

Some examples:

• Sticky Tongue has 75% accuracy so $\text{MoveAccuracy}=75$.
• If this sticker also had the +20% Accuracy attribute, $\text{MoveAccuracy}=75\times 1.20=90$ so an effective 90% accuracy.
• If the user of this sticker had also been afflicted with Unitarget, $\text{MoveAccuracy}=90/2=45$ resulting in an effective 45% accuracy.

Defender Evasion

Doubling the defender's evasion such as via Evasion Up results in attacks only landing half the time, as they are now twice as difficult to hit. In general, if the defender's evasion is multiplied by some number $x$, attacks will only land $1/x$ of the time on average compared to normal; $x>1$ for evasion-boosting statuses and attributes while $0<x<1$ for evasion-lowering statuses. As such, if $x=1/100$ which can be achieved via inflicting the Evasion Nullified status effect, all attacks are guaranteed to land if there are no other modifiers present.

If the attacker targets a teammate, $\text{DefenderEvasion}$is instead set to 100.

The base values for the evasion of tapes and characters are 100, so the formula can be simplified as such:

$\begin{array}{rl}\text{DefenderEvasion}& =100\times \prod _{\text{m}\in \text{stickers}}(\frac{{\text{EvasionAttribute}}_{\text{m}}+100}{100}\times \text{EvasionStatModifier})\\ & \times \text{EvasionStageMultiplier}\times \text{EvasionStatusMultiplier}\end{array}$

• $\text{EvasionAttribute}$ accounts for the Passive: +x% Evasion and Passive: +% Evasion per empty slot attributes across all stickers in the tape, which are multiplied together instead of being additive.
• $\text{EvasionStatModifier}$ uses the multiplier from Shear Luck if present.
• $\text{EvasionStageMultiplier}$ is the multiplier from all present stat stages that affect evasion.
• $\text{EvasionStatusMultiplier}$ is a separate multiplier used by certain status effects.
  • Evasion Nullified has a multiplier of 1/100.

Some examples:

• With no attributes present or stat stages in play, defender evasion is 100, similar to attacker accuracy.
• A Bansheep tape at 20% HP with one Shear Luck sticker has $\text{EvasionStatModifier}=1+0.8/2=1.4$ and so$\text{DefenderEvasion}=100\times 1.4=140.$
• With 2 Shear Luck stickers instead, at 20% HP this tape will have $\text{DefenderEvasion}=100\times (1.4{)}^2=196.$
• If a target has been afflicted with the Evasion Nullified status effect, $\text{EvasionStatusMuliplier}=1/100$ so $\text{DefenderEvasion}=100\times (1/100)=1.$
• If a target has both Evasion Up and Evasion Nullified, the former has a +4 (+100%) stat stage giving $\text{EvasionStatMultiplier}=8/4=2$. Meanwhile, the latter amounts to setting $\text{EvasionStatusMuliplier}=1/100$ so the end result is $\text{DefenderEvasion}=100\times 2\times (1/100)=2.$

Accuracy Statuses

Main article: Stat Stages

Icon	Name	Stages
	Accuracy Up	+2	+50%
	Accuracy Down	-2	-33%
	Gambit	+4	+100%

Evasion Statuses

Main article: Stat Stages

Icon	Name	Stages
	Evasion Up	+4	+100%
	Evasion Down	-4	-50%
	Evasion Nullified	*

Mechanics

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