diff --git a/src/data/ability.ts b/src/data/ability.ts
index 7cf4c8d0b..3deef28b4 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -131,6 +131,15 @@ export class PreDefendAbAttr extends AbAttr {
   }
 }
 
+export class PreDefendEndureAbAttr extends PreDefendAbAttr {
+  applyPreDefend(pokemon: Pokemon, attacker: Pokemon, move: PokemonMove, cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    if (pokemon.getHpRatio() < 1 || (args[0] as Utils.NumberHolder).value < pokemon.hp)
+      return false;
+
+    return pokemon.addTag(BattlerTagType.ENDURING, 1);
+  }
+}
+
 export class BlockItemTheftAbAttr extends AbAttr {
   apply(pokemon: Pokemon, cancelled: Utils.BooleanHolder, args: any[]): boolean {
     cancelled.value = true;
@@ -798,6 +807,13 @@ export class BattlerTagImmunityAbAttr extends PreApplyBattlerTagAbAttr {
 
 export class BlockCritAbAttr extends AbAttr { }
 
+export class BlockOneHitKOAbAttr extends AbAttr {
+  apply(pokemon: Pokemon, cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    cancelled.value = false;
+    return true;
+  }
+}
+
 export class IgnoreContactAbAttr extends AbAttr { }
 
 export class PreWeatherEffectAbAttr extends AbAttr {
@@ -1610,7 +1626,9 @@ export function initAbilities() {
       .attr(PostTurnStatChangeAbAttr, BattleStat.SPD, 1),
     new Ability(Abilities.BATTLE_ARMOR, "Battle Armor", "Hard armor protects the Pokémon from critical hits.", 3)
       .attr(BlockCritAbAttr),
-    new Ability(Abilities.STURDY, "Sturdy (N)", "It cannot be knocked out with one hit. One-hit KO moves cannot knock it out, either.", 3),
+    new Ability(Abilities.STURDY, "Sturdy", "It cannot be knocked out with one hit. One-hit KO moves cannot knock it out, either.", 3)    
+      .attr(PreDefendEndureAbAttr)
+      .attr(BlockOneHitKOAbAttr),
     new Ability(Abilities.DAMP, "Damp (N)", "Prevents the use of explosive moves, such as Self-Destruct, by dampening its surroundings.", 3),
     new Ability(Abilities.LIMBER, "Limber", "Its limber body protects the Pokémon from paralysis.", 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.PARALYSIS),
diff --git a/src/data/move.ts b/src/data/move.ts
index 943b69e32..b09d82142 100644
--- a/src/data/move.ts
+++ b/src/data/move.ts
@@ -12,7 +12,7 @@ import * as Utils from "../utils";
 import { WeatherType } from "./weather";
 import { ArenaTagSide, ArenaTrapTag } from "./arena-tag";
 import { ArenaTagType } from "./enums/arena-tag-type";
-import { Abilities, ProtectAbilityAbAttr, BlockRecoilDamageAttr, IgnoreContactAbAttr, MaxMultiHitAbAttr, applyAbAttrs } from "./ability";
+import { Abilities, ProtectAbilityAbAttr, BlockRecoilDamageAttr, BlockOneHitKOAbAttr, IgnoreContactAbAttr, MaxMultiHitAbAttr, applyAbAttrs } from "./ability";
 import { PokemonHeldItemModifier } from "../modifier/modifier";
 import { BattlerIndex } from "../battle";
 import { Stat } from "./pokemon-stat";
@@ -913,7 +913,11 @@ export class OneHitKOAttr extends MoveAttr {
   }
 
   getCondition(): MoveConditionFunc {
-    return (user, target, move) => user.level >= target.level;
+    return (user, target, move) => {
+      const cancelled = new Utils.BooleanHolder(false);
+      applyAbAttrs(BlockOneHitKOAbAttr, target, cancelled);
+      return !cancelled && user.level >= target.level;
+    }
   }
 }
 
diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 63721d3e6..a248dcf75 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -25,7 +25,7 @@ import { TempBattleStat } from '../data/temp-battle-stat';
 import { WeakenMoveTypeTag } from '../data/arena-tag';
 import { ArenaTagType } from "../data/enums/arena-tag-type";
 import { Biome } from "../data/enums/biome";
-import { Abilities, Ability, BattleStatMultiplierAbAttr, BlockCritAbAttr, IgnoreOpponentStatChangesAbAttr, MoveImmunityAbAttr, NonSuperEffectiveImmunityAbAttr, PreApplyBattlerTagAbAttr, ReceivedMoveDamageMultiplierAbAttr, ReduceStatusEffectDurationAbAttr, StabBoostAbAttr, StatusEffectImmunityAbAttr, TypeImmunityAbAttr, VariableMovePowerAbAttr, WeightMultiplierAbAttr, allAbilities, applyAbAttrs, applyBattleStatMultiplierAbAttrs, applyPostDefendAbAttrs, applyPreApplyBattlerTagAbAttrs, applyPreAttackAbAttrs, applyPreDefendAbAttrs, applyPreSetStatusAbAttrs } from '../data/ability';
+import { Abilities, Ability, BattleStatMultiplierAbAttr, BlockCritAbAttr, IgnoreOpponentStatChangesAbAttr, MoveImmunityAbAttr, NonSuperEffectiveImmunityAbAttr, PreApplyBattlerTagAbAttr, PreDefendEndureAbAttr, ReceivedMoveDamageMultiplierAbAttr, ReduceStatusEffectDurationAbAttr, StabBoostAbAttr, StatusEffectImmunityAbAttr, TypeImmunityAbAttr, VariableMovePowerAbAttr, WeightMultiplierAbAttr, allAbilities, applyAbAttrs, applyBattleStatMultiplierAbAttrs, applyPostDefendAbAttrs, applyPreApplyBattlerTagAbAttrs, applyPreAttackAbAttrs, applyPreDefendAbAttrs, applyPreSetStatusAbAttrs } from '../data/ability';
 import PokemonData from '../system/pokemon-data';
 import { BattlerIndex } from '../battle';
 import { BattleSpec } from "../enums/battle-spec";
@@ -47,7 +47,7 @@ export enum FieldPosition {
 }
 
 const ABILITY_OVERRIDE = Abilities.NONE;
-const MOVE_OVERRIDE = Moves.NONE;
+const MOVE_OVERRIDE = Moves.NONE;;
 
 const OPP_ABILITY_OVERRIDE = Abilities.NONE;
 const OPP_MOVE_OVERRIDE = Moves.NONE;
@@ -1126,6 +1126,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
           }
 
           if (damage) {
+            applyPreDefendAbAttrs(PreDefendEndureAbAttr, this, source, battlerMove, cancelled, damage);
+
             const oneHitKo = result === HitResult.ONE_HIT_KO;
             damage.value = this.damageAndUpdate(damage.value, result as DamageResult, isCritical, oneHitKo, oneHitKo);
             if (isCritical)