pokemon rejuvenation hidden library 3: Walkthrough - Guide

pokemon rejuvenation hidden library 3: Walkthrough

Follow this Pokémon Rejuvenation Hidden Library 3 walkthrough for quest timing, key locations, battles, puzzles, and Banettite or Heracronite rewards.

2026-08-01
pokemon rejuvenation Wiki Team
Quick Guide
  • pokemon rejuvenation Hidden Library 3 begins in Chapter 9 after reaching West Gearen City.
  • Prerequisites: Finish Hidden Library 1 and Hidden Library 2 before accepting the third quest.
  • Main route: Investigate the library, find the west-wing key, and complete the Karen encounter.
  • Story detour: Travel through Atebit Town and Funky Forest before solving the Kabuto tile puzzle.
  • Final reward: Choose Banettite or Heracronite, then return to West Gearen Help Plaza.

pokemon rejuvenation Hidden Library 3 Overview

The pokemon rejuvenation Hidden Library 3 quest continues Karen’s investigation into the Hidden Library. It begins in Chapter 9 and combines exploration, chase sequences, multiple battles, a forest hazard section, and a Kabuto tile puzzle. The quest is available after gaining access to West Gearen City, but it is not permanently available throughout the story.

You must complete Hidden Library 1 and Hidden Library 2 first. The quest expires in Chapter 10 after entering the train bound for Grand Dream City, so finish it before triggering that point of progression.

Quest DetailInformation
Quest nameThe Hidden Library 3
Starting chapterChapter 9
Starting areaWest Gearen Help Plaza
Main locationHidden Library
Quest giverKaren
Required questsHidden Library 1 and Hidden Library 2
Expiration pointChapter 10, after entering the Grand Dream City train
Main reward choiceBanettite or Heracronite
Additional listed reward4,000 Poké Dollars
Do Not Miss the Chapter Window

Complete this quest before entering the train to Grand Dream City in Chapter 10. If you pass that progression point first, the Hidden Library 3 quest is no longer available during that playthrough segment.

Library Investigation

Meet Karen, respond to Karrina’s interruption, and work through the locked-library sequence.

West Wing Route

Search the East Wing for the key, then enter the West Wing and advance through Karen’s attack patterns.

Atebit Detour

Follow Alice or Allen through Atebit Town, the house, and the dangerous Funky Forest.

Mega Stone Choice

Open the final door with Karrina and select either Banettite or Heracronite.

How to Start the Hidden Library 3 Quest

Begin at the West Gearen Help Plaza during Chapter 9. Accept the Hidden Library 3 request, then travel to the Hidden Library and enter the north room. Speak with Karen to begin the next part of the investigation.

Karrina soon interrupts the meeting, and the events that follow lock you inside the library. At this stage, treat the quest as a connected route rather than a normal fetch quest. The next objectives are all inside the building, and leaving the intended rooms may not advance the sequence.

StageObjectiveAreaProgress Check
1Accept the questWest Gearen Help PlazaHidden Library 3 is available in Chapter 9
2Meet KarenHidden Library, north roomKarrina interrupts the meeting
3Search for KarrinaHidden LibraryThe library lock-in sequence begins
4Reach the East WingHidden LibraryContinue after the Karen and Karrina events
5Find the west-wing keyEast WingKey is located at the top-left end of the room
6Enter the West WingHidden LibraryThe Karen challenge begins
Route Tip

After the library becomes locked, follow the marked story path through the north and east rooms. The key is at the top-left end of the East Wing, so check that area before searching elsewhere.

1

Accept the Request

Go to West Gearen Help Plaza and accept The Hidden Library 3. Confirm that the first two Hidden Library quests are already complete before leaving the plaza.

2

Meet Karen

Travel to the Hidden Library, enter the north room, and speak with Karen. Karrina’s interruption moves the quest into its locked-library sequence.

3

Search the East Wing

Exit the north room after the story events, enter the east room, and investigate the top-left end to find the key to the West Wing.

4

Enter the West Wing

Use the key to open the West Wing. Prepare for the Karen challenge before continuing into the next room.

5

Continue the Story Route

Defeat Karrina, follow the Atebit Town events, clear Funky Forest, solve the Kabuto tile puzzle, and return to the north wing for the final choice.

Karen’s Challenge and the Karrina Battle

The West Wing contains the quest’s first major movement challenge. Karen attacks while you attempt to reach her position. You must complete the approach three times, with each round becoming more difficult.

Focus on careful movement rather than rushing. Watch the attack pattern, identify a safe opening, and advance only when the path is clear. The objective is to reach Karen’s position, not to defeat her directly during this sequence.

After reaching Karen, enter the following room and battle Karrina. The battle takes place on Blessed Field as a Single Battle. Karrina does not use healing items, while Karen’s Garufan magic changes the types of Karrina’s Pokémon during the encounter.

EncounterBattle FormatField EffectSpecial RuleListed Reward
Karrina, first encounterSingle BattleBlessed FieldKaren changes Pokémon types with Garufan magic1,534+ Poké Dollars
AllenSingle BattleGlitch FieldNo healing items; Absol EVs noted for version 13.5.610,530+ Poké Dollars
Karrina, later encounterSingle BattleBlessed FieldType changes continue through Garufan magic1,180+ Poké Dollars
Allen, later encounterSingle BattleGlitch FieldNo healing items9,150+ Poké Dollars
Battle Preparation

The Karrina fight is affected by changing Pokémon types, so avoid building your entire strategy around one expected weakness. Bring flexible coverage and keep your team healthy before entering the West Wing.

Use Flexible Coverage

Carry moves from several types so changing matchups do not leave your team without reliable damage.

Control the Pace

Heal and organize your party before entering the battle room because the listed opponents do not use healing items.

Respect the Fields

Blessed Field and Glitch Field can alter how familiar strategies perform. Test your first turn before committing to a setup plan.

Atebit Town and Funky Forest Route

After defeating Karrina, the story moves you to Atebit Town. Head north and follow Alice or Allen into their house. Speak with Alice there, then travel to Funky Forest and reach the end of the area.

Funky Forest contains red flowers that function as route hazards. Touching one sends you back to the forest entrance, so move around them instead of trying to cross the shortest possible path. Once you find Alice, the story returns you to the house.

Speak with Alice again to unlock the next departure. Return to the forest, defeat Allen, and then enter the cave. The route now changes from exploration to a puzzle sequence.

Route SegmentRequired ActionMain HazardCompletion Result
Atebit TownHead north and enter the houseNone statedSpeak with Alice
Funky Forest, first visitReach the end and locate AliceRed flowers return you to the entranceStory returns to the house
Atebit house, second visitSpeak with Alice againNone statedYou can leave the house
Funky Forest, second visitReturn and defeat AllenBattle encounterCave entrance becomes available
CaveComplete the Kabuto tile puzzlePuzzle navigationThe route returns to reality
Funky Forest Hazard

Avoid every red flower while searching the forest. A single contact can transport you back to the entrance and force you to repeat the route.

Before Leaving the Forest:

  • Speak with Alice in the Atebit Town house
  • Reach Alice at the end of Funky Forest
  • Return to the house and speak with Alice again
  • Defeat Allen during the second forest visit
  • Enter the cave and prepare for the Kabuto tile puzzle

The cave puzzle uses Kabuto-themed tiles. Examine the available tile arrangement carefully and move methodically instead of making rapid guesses. Once the puzzle is completed, the story returns you to reality and opens the final Hidden Library route.

Final Library Choice and Rewards

After completing the cave sequence, make your way to the north wing of the Hidden Library. Karrina helps open the door, leading to the quest’s final reward choice.

Inside, choose one Mega Stone: Banettite or Heracronite. The selection is the central permanent reward decision for this quest, so consider which Mega Evolution better fits your current collection and future team plans.

Once the stone is selected, the quest concludes. Return to West Gearen Help Plaza to receive the remaining rewards and finish the request.

Final ObjectiveLocationResult
Return to the libraryHidden Library, north wingResume the post-puzzle story route
Open the final doorNorth wing, with KarrinaEnter the reward room
Select a Mega StoneReward roomChoose Banettite or Heracronite
Finish the requestWest Gearen Help PlazaReceive the remaining quest rewards
Reward Decision

Choose between Banettite and Heracronite based on the Pokémon you expect to use. The quest presents the stones as an either-or selection, so review your team before confirming.

Banettite

Select this option if Mega Banette is more valuable to your planned roster, collection goals, or preferred battle style.

Heracronite

Select this option if Mega Heracross better supports your team or fills a role you currently lack.

The supplied quest information confirms the choice between these two stones and lists 4,000 Poké Dollars among the rewards. It also records additional battle payouts during the Karrina and Allen encounters. Because encounter details can vary by game version, check your current build before relying on older team data.

Q: When can I start Pokémon Rejuvenation Hidden Library 3?

You can start the quest in Chapter 9 after gaining access to West Gearen City. Hidden Library 1 and Hidden Library 2 must be completed first.

Q: When does Hidden Library 3 expire?

The quest expires in Chapter 10 after you enter the train traveling to Grand Dream City. Finish the quest before boarding at that progression point.

Q: Where is the key to the West Wing?

After the library lock-in events, enter the East Wing and search the top-left end of the room. The key opens the route into the West Wing.

Q: Which Mega Stone should I choose?

The reward room lets you choose Banettite or Heracronite. Pick the stone that best matches your current roster and planned Mega Evolution choices.