diff --git a/src/data/mystery-encounters/encounters/dark-deal.ts b/src/data/mystery-encounters/encounters/dark-deal.ts
index a78144347af..7bdbac2a42f 100644
--- a/src/data/mystery-encounters/encounters/dark-deal.ts
+++ b/src/data/mystery-encounters/encounters/dark-deal.ts
@@ -67,7 +67,7 @@ const excludedBosses = [
   Species.PECHARUNT
 ];
 
-export const DarkDealEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const DarkDealEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.DARK_DEAL)
   .withEncounterTier(MysteryEncounterTier.ROGUE)
   .withIntroSpriteConfigs([
diff --git a/src/data/mystery-encounters/encounters/department-store-sale.ts b/src/data/mystery-encounters/encounters/department-store-sale.ts
index 935ed635f9e..a60b6dfa4bf 100644
--- a/src/data/mystery-encounters/encounters/department-store-sale.ts
+++ b/src/data/mystery-encounters/encounters/department-store-sale.ts
@@ -11,7 +11,7 @@ import { modifierTypes } from "#app/modifier/modifier-type";
 import { Species } from "#enums/species";
 import { randSeedInt } from "#app/utils";
 
-export const DepartmentStoreSaleEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const DepartmentStoreSaleEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.DEPARTMENT_STORE_SALE)
   .withEncounterTier(MysteryEncounterTier.COMMON)
   .withIntroSpriteConfigs([
diff --git a/src/data/mystery-encounters/encounters/fight-or-flight.ts b/src/data/mystery-encounters/encounters/fight-or-flight.ts
index 8669f6259fe..6b852ea7512 100644
--- a/src/data/mystery-encounters/encounters/fight-or-flight.ts
+++ b/src/data/mystery-encounters/encounters/fight-or-flight.ts
@@ -36,7 +36,7 @@ const validMovesForSteal = [
   Moves.GIGA_DRAIN
 ];
 
-export const FightOrFlightEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const FightOrFlightEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.FIGHT_OR_FLIGHT)
   .withEncounterTier(MysteryEncounterTier.COMMON)
   .withIntroSpriteConfigs([]) // Set in onInit()
diff --git a/src/data/mystery-encounters/encounters/mysterious-challengers.ts b/src/data/mystery-encounters/encounters/mysterious-challengers.ts
index d3e753cc91b..25b39b0667a 100644
--- a/src/data/mystery-encounters/encounters/mysterious-challengers.ts
+++ b/src/data/mystery-encounters/encounters/mysterious-challengers.ts
@@ -15,7 +15,7 @@ import {
 import * as Utils from "../../../utils";
 import { PartyMemberStrength } from "#enums/party-member-strength";
 
-export const MysteriousChallengersEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const MysteriousChallengersEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.MYSTERIOUS_CHALLENGERS)
   .withEncounterTier(MysteryEncounterTier.GREAT)
   .withIntroSpriteConfigs([]) // These are set in onInit()
diff --git a/src/data/mystery-encounters/encounters/mysterious-chest.ts b/src/data/mystery-encounters/encounters/mysterious-chest.ts
index 9f8faf278fa..8ad0a5adb52 100644
--- a/src/data/mystery-encounters/encounters/mysterious-chest.ts
+++ b/src/data/mystery-encounters/encounters/mysterious-chest.ts
@@ -15,7 +15,7 @@ import { MysteryEncounterOptionBuilder } from "../mystery-encounter-option";
 import { GameOverPhase } from "#app/phases";
 import { randSeedInt } from "#app/utils";
 
-export const MysteriousChestEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const MysteriousChestEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.MYSTERIOUS_CHEST)
   .withEncounterTier(MysteryEncounterTier.COMMON)
   .withIntroSpriteConfigs([
diff --git a/src/data/mystery-encounters/encounters/shady-vitamin-dealer.ts b/src/data/mystery-encounters/encounters/shady-vitamin-dealer.ts
index 06cdfbff4c8..866b63f7533 100644
--- a/src/data/mystery-encounters/encounters/shady-vitamin-dealer.ts
+++ b/src/data/mystery-encounters/encounters/shady-vitamin-dealer.ts
@@ -22,7 +22,7 @@ import { randSeedInt } from "#app/utils";
 import Pokemon, { PlayerPokemon } from "#app/field/pokemon";
 import { StatusEffect } from "#app/data/status-effect";
 
-export const ShadyVitaminDealerEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const ShadyVitaminDealerEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.SHADY_VITAMIN_DEALER)
   .withEncounterTier(MysteryEncounterTier.COMMON)
   .withIntroSpriteConfigs([
diff --git a/src/data/mystery-encounters/encounters/sleeping-snorlax.ts b/src/data/mystery-encounters/encounters/sleeping-snorlax.ts
index b75787ad566..3c94da5129b 100644
--- a/src/data/mystery-encounters/encounters/sleeping-snorlax.ts
+++ b/src/data/mystery-encounters/encounters/sleeping-snorlax.ts
@@ -21,7 +21,7 @@ import { Status, StatusEffect } from "../../status-effect";
 import { Moves } from "#enums/moves";
 import { BerryType } from "#enums/berry-type";
 
-export const SleepingSnorlaxEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const SleepingSnorlaxEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.SLEEPING_SNORLAX)
   .withEncounterTier(MysteryEncounterTier.ULTRA)
   .withIntroSpriteConfigs([
diff --git a/src/data/mystery-encounters/encounters/training-session.ts b/src/data/mystery-encounters/encounters/training-session.ts
index 6c50209e4ca..ad5da7ded36 100644
--- a/src/data/mystery-encounters/encounters/training-session.ts
+++ b/src/data/mystery-encounters/encounters/training-session.ts
@@ -24,7 +24,7 @@ import { AbilityAttr } from "#app/system/game-data";
 import { Stat } from "#app/data/pokemon-stat";
 import { pokemonInfo } from "#app/locales/en/pokemon-info";
 
-export const TrainingSessionEncounter: MysteryEncounter = new MysteryEncounterBuilder()
+export const TrainingSessionEncounter: MysteryEncounter = MysteryEncounterBuilder
   .withEncounterType(MysteryEncounterType.TRAINING_SESSION)
   .withEncounterTier(MysteryEncounterTier.ULTRA)
   .withIntroSpriteConfigs([
diff --git a/src/data/mystery-encounters/mystery-encounter.ts b/src/data/mystery-encounters/mystery-encounter.ts
index 9e956e6050f..8071dc81c8f 100644
--- a/src/data/mystery-encounters/mystery-encounter.ts
+++ b/src/data/mystery-encounters/mystery-encounter.ts
@@ -360,12 +360,12 @@ export class MysteryEncounterBuilder implements Partial<MysteryEncounter> {
    */
 
   /**
-   * Defines the type of encounter which is used as an identifier, should be tied to a unique MysteryEncounterType
+   * @statif Defines the type of encounter which is used as an identifier, should be tied to a unique MysteryEncounterType
    * @param encounterType
    * @returns this
    */
-  withEncounterType(encounterType: MysteryEncounterType): this & Pick<MysteryEncounter, "encounterType"> {
-    return Object.assign(this, { encounterType: encounterType });
+  static withEncounterType(encounterType: MysteryEncounterType): MysteryEncounterBuilder & Pick<MysteryEncounter, "encounterType"> {
+    return Object.assign(new MysteryEncounterBuilder(), { encounterType: encounterType });
   }
 
   /**