diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index df852126bc2..1628a1271d1 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -4,7 +4,7 @@ import Pokemon, { EnemyPokemon, PlayerPokemon } from "./field/pokemon";
 import PokemonSpecies, { allSpecies, getPokemonSpecies, PokemonSpeciesFilter } from "./data/pokemon-species";
 import { Constructor, isNullOrUndefined, randSeedInt } from "#app/utils";
 import * as Utils from "./utils";
-import { ConsumableModifier, ConsumablePokemonModifier, DoubleBattleChanceBoosterModifier, ExpBalanceModifier, ExpShareModifier, FusePokemonModifier, HealingBoosterModifier, Modifier, ModifierBar, ModifierPredicate, MultipleParticipantExpBonusModifier, overrideHeldItems, overrideModifiers, PersistentModifier, PokemonExpBoosterModifier, PokemonFormChangeItemModifier, PokemonHeldItemModifier, PokemonHpRestoreModifier, PokemonIncrementingStatModifier, TerastallizeModifier, TurnHeldItemTransferModifier } from "./modifier/modifier";
+import { ConsumableModifier, ConsumablePokemonModifier, DoubleBattleChanceBoosterModifier, ExpBalanceModifier, ExpShareModifier, FusePokemonModifier, HealingBoosterModifier, Modifier, ModifierBar, ModifierPredicate, MultipleParticipantExpBonusModifier, overrideHeldItems, overrideModifiers, PersistentModifier, PokemonExpBoosterModifier, PokemonFormChangeItemModifier, PokemonHeldItemModifier, PokemonHpRestoreModifier, PokemonIncrementingStatModifier, RememberMoveModifier, TerastallizeModifier, TurnHeldItemTransferModifier } from "./modifier/modifier";
 import { PokeballType } from "./data/pokeball";
 import { initCommonAnims, initMoveAnim, loadCommonAnimAssets, loadMoveAnimAssets, populateAnims } from "./data/battle-anims";
 import { Phase } from "./phase";
@@ -2429,7 +2429,7 @@ export default class BattleScene extends SceneBase {
     return Math.floor(moneyValue / 10) * 10;
   }
 
-  addModifier(modifier: Modifier | null, ignoreUpdate?: boolean, playSound?: boolean, virtual?: boolean, instant?: boolean): Promise<boolean> {
+  addModifier(modifier: Modifier | null, ignoreUpdate?: boolean, playSound?: boolean, virtual?: boolean, instant?: boolean, cost?: number): Promise<boolean> {
     if (!modifier) {
       return Promise.resolve(false);
     }
@@ -2483,6 +2483,8 @@ export default class BattleScene extends SceneBase {
               }
             } else if (modifier instanceof FusePokemonModifier) {
               args.push(this.getPokemonById(modifier.fusePokemonId) as PlayerPokemon);
+            } else if (modifier instanceof RememberMoveModifier) {
+              args.push(cost);
             }
 
             if (modifier.shouldApply(args)) {
diff --git a/src/modifier/modifier-type.ts b/src/modifier/modifier-type.ts
index 238d2f0debf..d0493507249 100644
--- a/src/modifier/modifier-type.ts
+++ b/src/modifier/modifier-type.ts
@@ -2226,7 +2226,8 @@ export function getPlayerShopModifierTypeOptionsForWave(waveIndex: integer, base
     ],
     [
       new ModifierTypeOption(modifierTypes.ELIXIR(), 0, baseCost),
-      new ModifierTypeOption(modifierTypes.MAX_ETHER(), 0, baseCost)
+      new ModifierTypeOption(modifierTypes.MAX_ETHER(), 0, baseCost),
+      new ModifierTypeOption(modifierTypes.MEMORY_MUSHROOM(), 0, baseCost * 2)
     ],
     [
       new ModifierTypeOption(modifierTypes.HYPER_POTION(), 0, baseCost * 0.8),
diff --git a/src/modifier/modifier.ts b/src/modifier/modifier.ts
index 4c20b454081..46218c6bbcc 100644
--- a/src/modifier/modifier.ts
+++ b/src/modifier/modifier.ts
@@ -2005,8 +2005,9 @@ export class RememberMoveModifier extends ConsumablePokemonModifier {
 
   apply(args: any[]): boolean {
     const pokemon = args[0] as PlayerPokemon;
+    const cost = args[1] as number;
 
-    pokemon.scene.unshiftPhase(new LearnMovePhase(pokemon.scene, pokemon.scene.getParty().indexOf(pokemon), pokemon.getLearnableLevelMoves()[this.levelMoveIndex]));
+    pokemon.scene.unshiftPhase(new LearnMovePhase(pokemon.scene, pokemon.scene.getParty().indexOf(pokemon), pokemon.getLearnableLevelMoves()[this.levelMoveIndex], false, cost));
 
     return true;
   }
diff --git a/src/phases/learn-move-phase.ts b/src/phases/learn-move-phase.ts
index 5b4b16f3785..be6f7378a67 100644
--- a/src/phases/learn-move-phase.ts
+++ b/src/phases/learn-move-phase.ts
@@ -2,24 +2,28 @@ import BattleScene from "#app/battle-scene";
 import { initMoveAnim, loadMoveAnimAssets } from "#app/data/battle-anims";
 import Move, { allMoves } from "#app/data/move";
 import { SpeciesFormChangeMoveLearnedTrigger } from "#app/data/pokemon-forms";
-import { Moves } from "#app/enums/moves";
+import { Moves } from "#enums/moves";
 import { getPokemonNameWithAffix } from "#app/messages";
+import Overrides from "#app/overrides";
 import EvolutionSceneHandler from "#app/ui/evolution-scene-handler";
 import { SummaryUiMode } from "#app/ui/summary-ui-handler";
 import { Mode } from "#app/ui/ui";
 import i18next from "i18next";
-import { PlayerPartyMemberPokemonPhase } from "./player-party-member-pokemon-phase";
+import { PlayerPartyMemberPokemonPhase } from "#app/phases/player-party-member-pokemon-phase";
 import Pokemon from "#app/field/pokemon";
+import { SelectModifierPhase } from "#app/phases/select-modifier-phase";
 
 export class LearnMovePhase extends PlayerPartyMemberPokemonPhase {
   private moveId: Moves;
   private messageMode: Mode;
   private fromTM: boolean;
+  private cost: number;
 
-  constructor(scene: BattleScene, partyMemberIndex: integer, moveId: Moves, fromTM?: boolean) {
+  constructor(scene: BattleScene, partyMemberIndex: integer, moveId: Moves, fromTM?: boolean, cost: number = -1) {
     super(scene, partyMemberIndex);
     this.moveId = moveId;
     this.fromTM = fromTM ?? false;
+    this.cost = cost;
   }
 
   start() {
@@ -143,6 +147,17 @@ export class LearnMovePhase extends PlayerPartyMemberPokemonPhase {
       pokemon.usedTMs.push(this.moveId);
     }
     pokemon.setMove(index, this.moveId);
+    if (this.cost !== -1) {
+      if (!Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
+        this.scene.money -= this.cost;
+        this.scene.updateMoneyText();
+        this.scene.animateMoneyChanged(false);
+      }
+      this.scene.playSound("se/buy");
+    } else if (this.fromTM) {
+      // NOTE: this assumes
+      this.scene.tryRemovePhase((phase) => phase instanceof SelectModifierPhase);
+    }
     initMoveAnim(this.scene, this.moveId).then(() => {
       loadMoveAnimAssets(this.scene, [this.moveId], true);
       this.scene.playSound("level_up_fanfare"); // Sound loaded into game as is
diff --git a/src/phases/select-modifier-phase.ts b/src/phases/select-modifier-phase.ts
index ba55340bd8d..10030fed274 100644
--- a/src/phases/select-modifier-phase.ts
+++ b/src/phases/select-modifier-phase.ts
@@ -17,6 +17,8 @@ export class SelectModifierPhase extends BattlePhase {
   private modifierTiers?: ModifierTier[];
   private customModifierSettings?: CustomModifierSettings;
 
+  private typeOptions: ModifierTypeOption[];
+
   constructor(scene: BattleScene, rerollCount: integer = 0, modifierTiers?: ModifierTier[], customModifierSettings?: CustomModifierSettings) {
     super(scene);
 
@@ -54,7 +56,7 @@ export class SelectModifierPhase extends BattlePhase {
       }
     }
 
-    const typeOptions: ModifierTypeOption[] = this.getModifierTypeOptions(modifierCount.value);
+    this.typeOptions = this.getModifierTypeOptions(modifierCount.value);
 
     const modifierSelectCallback = (rowCursor: integer, cursor: integer) => {
       if (rowCursor < 0 || cursor < 0) {
@@ -63,13 +65,13 @@ export class SelectModifierPhase extends BattlePhase {
             this.scene.ui.revertMode();
             this.scene.ui.setMode(Mode.MESSAGE);
             super.end();
-          }, () => this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers)));
+          }, () => this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers)));
         });
         return false;
       }
       let modifierType: ModifierType;
       let cost: integer;
-      const rerollCost = this.getRerollCost(typeOptions, this.scene.lockModifierTiers);
+      const rerollCost = this.getRerollCost(this.scene.lockModifierTiers);
       switch (rowCursor) {
       case 0:
         switch (cursor) {
@@ -79,7 +81,7 @@ export class SelectModifierPhase extends BattlePhase {
             return false;
           } else {
             this.scene.reroll = true;
-            this.scene.unshiftPhase(new SelectModifierPhase(this.scene, this.rerollCount + 1, typeOptions.map(o => o.type?.tier).filter(t => t !== undefined) as ModifierTier[]));
+            this.scene.unshiftPhase(new SelectModifierPhase(this.scene, this.rerollCount + 1, this.typeOptions.map(o => o.type?.tier).filter(t => t !== undefined) as ModifierTier[]));
             this.scene.ui.clearText();
             this.scene.ui.setMode(Mode.MESSAGE).then(() => super.end());
             if (!Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
@@ -98,13 +100,13 @@ export class SelectModifierPhase extends BattlePhase {
               const itemModifier = itemModifiers[itemIndex];
               this.scene.tryTransferHeldItemModifier(itemModifier, party[toSlotIndex], true, itemQuantity);
             } else {
-              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
             }
           }, PartyUiHandler.FilterItemMaxStacks);
           break;
         case 2:
           this.scene.ui.setModeWithoutClear(Mode.PARTY, PartyUiMode.CHECK, -1, () => {
-            this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+            this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
           });
           break;
         case 3:
@@ -115,21 +117,21 @@ export class SelectModifierPhase extends BattlePhase {
           }
           this.scene.lockModifierTiers = !this.scene.lockModifierTiers;
           const uiHandler = this.scene.ui.getHandler() as ModifierSelectUiHandler;
-          uiHandler.setRerollCost(this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+          uiHandler.setRerollCost(this.getRerollCost(this.scene.lockModifierTiers));
           uiHandler.updateLockRaritiesText();
           uiHandler.updateRerollCostText();
           return false;
         }
         return true;
       case 1:
-        if (typeOptions.length === 0) {
+        if (this.typeOptions.length === 0) {
           this.scene.ui.clearText();
           this.scene.ui.setMode(Mode.MESSAGE);
           super.end();
           return true;
         }
-        if (typeOptions[cursor].type) {
-          modifierType = typeOptions[cursor].type;
+        if (this.typeOptions[cursor].type) {
+          modifierType = this.typeOptions[cursor].type;
         }
         break;
       default:
@@ -151,8 +153,16 @@ export class SelectModifierPhase extends BattlePhase {
       }
 
       const applyModifier = (modifier: Modifier, playSound: boolean = false) => {
-        const result = this.scene.addModifier(modifier, false, playSound);
-        if (cost) {
+        const result = this.scene.addModifier(modifier, false, playSound, undefined, undefined, cost);
+        // Queue a copy of this phase when applying a TM or Memory Mushroom.
+        // If the player selects either of these, then escapes out of consuming them,
+        // they are returned to a shop in the same state.
+        if (modifier.type instanceof RememberMoveModifierType ||
+            modifier.type instanceof TmModifierType) {
+          this.scene.unshiftPhase(this.copy());
+        }
+
+        if (cost && !(modifier.type instanceof RememberMoveModifierType)) {
           result.then(success => {
             if (success) {
               if (!Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
@@ -189,7 +199,7 @@ export class SelectModifierPhase extends BattlePhase {
                 applyModifier(modifier, true);
               });
             } else {
-              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
             }
           }, modifierType.selectFilter);
         } else {
@@ -216,7 +226,7 @@ export class SelectModifierPhase extends BattlePhase {
                 applyModifier(modifier!, true); // TODO: is the bang correct?
               });
             } else {
-              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
             }
           }, pokemonModifierType.selectFilter, modifierType instanceof PokemonMoveModifierType ? (modifierType as PokemonMoveModifierType).moveSelectFilter : undefined, tmMoveId, isPpRestoreModifier);
         }
@@ -226,7 +236,7 @@ export class SelectModifierPhase extends BattlePhase {
 
       return !cost!;// TODO: is the bang correct?
     };
-    this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+    this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
   }
 
   updateSeed(): void {
@@ -237,13 +247,13 @@ export class SelectModifierPhase extends BattlePhase {
     return true;
   }
 
-  getRerollCost(typeOptions: ModifierTypeOption[], lockRarities: boolean): number {
+  getRerollCost(lockRarities: boolean): number {
     let baseValue = 0;
     if (Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
       return baseValue;
     } else if (lockRarities) {
       const tierValues = [50, 125, 300, 750, 2000];
-      for (const opt of typeOptions) {
+      for (const opt of this.typeOptions) {
         baseValue += tierValues[opt.type.tier ?? 0];
       }
     } else {
@@ -271,6 +281,10 @@ export class SelectModifierPhase extends BattlePhase {
     return getPlayerModifierTypeOptions(modifierCount, this.scene.getParty(), this.scene.lockModifierTiers ? this.modifierTiers : undefined, this.customModifierSettings);
   }
 
+  copy(): SelectModifierPhase {
+    return new SelectModifierPhase(this.scene, this.rerollCount, this.modifierTiers, {guaranteedModifierTypeOptions: this.typeOptions});
+  }
+
   addModifier(modifier: Modifier): Promise<boolean> {
     return this.scene.addModifier(modifier, false, true);
   }
diff --git a/src/test/phases/select-modifier-phase.test.ts b/src/test/phases/select-modifier-phase.test.ts
index d946c850ae3..fdb89c1f661 100644
--- a/src/test/phases/select-modifier-phase.test.ts
+++ b/src/test/phases/select-modifier-phase.test.ts
@@ -63,11 +63,11 @@ describe("SelectModifierPhase", () => {
       new ModifierTypeOption(modifierTypes.REVIVE(), 0, 1000)
     ];
 
-    const selectModifierPhase1 = new SelectModifierPhase(scene);
-    const selectModifierPhase2 = new SelectModifierPhase(scene, 0, undefined, { rerollMultiplier: 2 });
+    const selectModifierPhase1 = new SelectModifierPhase(scene, 0, undefined, { guaranteedModifierTypeOptions: options });
+    const selectModifierPhase2 = new SelectModifierPhase(scene, 0, undefined, { guaranteedModifierTypeOptions: options, rerollMultiplier: 2 });
 
-    const cost1 = selectModifierPhase1.getRerollCost(options, false);
-    const cost2 = selectModifierPhase2.getRerollCost(options, false);
+    const cost1 = selectModifierPhase1.getRerollCost(false);
+    const cost2 = selectModifierPhase2.getRerollCost(false);
     expect(cost2).toEqual(cost1 * 2);
   });