Super Mario RPG Walkthrough & Guides Wiki

Super Mario RPG

How to Open the Door in Monstro Town

★ Super Mario RPG Remake out now: Full review here!
┗ Changes from the Original Game
★ Complete 100% Walkthrough updated for the Remake!
☆ 12 Beginner's Tips and Tricks
★ Best Character Tier List
☆ Secrets and Easter Eggs

This is a guide to opening the Sealed Door which houses the Secret Boss Culex in Monstro Town. Learn the step-by-step process to unlocking the door, what items you need, and at when you should open it.

List of Contents

How to Open the Sealed Door

Open with a Shiny Stone

Sealed Door Unlock Step-by-Step Guide
CheckmarkBuy Fireworks in Moleville
CheckmarkExchange Fireworks with a Shiny Stone
CheckmarkUnlock Sealed Door in Monstro Town

Buy Fireworks in Moleville

Super Mario RPG - Moleville Fireworks Vendor.png

The first step to unlocking the Sealed Door is by purchasing Fireworks in Moleville. These can be bought from a mole for 500 coins. Once bought, proceed to the next step.

How to Farm Coins

Exchange Fireworks with a Shiny Stone

Super Mario RPG - Moleville Fireworks Shop

The purchased Fireworks then must be exchanged with a girl mole next to the house where you bought the Fireworks.

Once you have acquired the Shiny Stone, proceed to Monstro Town, where it must be used to enter a sealed door leading to Culex.

Unlock Sealed Door in Monstro Town

Super Mario RPG Remake - Unlock Culex

In Monstro Town, proceed to the sealed door that will react to the Shiny Stone. When interacted with, the door will be opened.

Proceeding inside will lead to a dimension with Culex in view. The boss will ask you if you wish to take up a challenge of combat against it.

The Shiny Stone will not be lost after opening the Sealed Door, so you can choose to sell it again to the Mole in Moleville to get some Carbo Cookies.

How to Beat Culex Secret Boss

What is in the Sealed Door?

Leads to the Secret Boss Culex

Super Mario RPG - Versus Culex

The Sealed Door in Monstro Town houses Culex, a secret boss that is best fought at party level 20 or above.

Culex is a difficult boss, so be prepared! If you are not ready yet, you can choose to decline the challenge and return at any time. Consider looking for the best equipment and forming the best party before fighting him.

Defeating him will reward you the Quartz Charm, one of the best accessories in the game.

All Bosses and Secret Bosses

Super Mario RPG Remake Related Guides

Super Mario RPG - Return to Top Page

Super Mario RPG Remake Top Page

Super Mario RPG Remake Categories

All Categories
Super Mario RPG - WalkthroughWalkthrough Super Mario RPG - CharactersCharacters
Super Mario RPG Remake - BossesBosses Super Mario RPG Remake - Maps and LocationsMaps and Locations
Super Mario RPG Remake - WeaponsWeapons Super Mario RPG Remake - ArmorArmor
Super Mario RPG Remake - AccessoriesAccessories Super Mario RPG - ItemsItems
Super Mario RPG - Special MovesSpecial Moves Super Mario RPG Remake - EnemiesEnemies and Monster List
Super Mario RPG - Enemy AttacksEnemy Attacks Super Mario RPG Remake - Hidden Treasure ChestsHidden Treasure Chests

Super Mario RPG Remake Tips and Tricks

Gameplay Tips and Tricks
Beginner's Guide Best Strategy to Win Battles
How Long to Beat All Missables and Choices
What to Spend Frog Coins On How to Block Attacks and Timing
Action Command Timing for Special Moves List of All Equipment
All Shops and Locations How to Get a Freebie
List of All Side Quests Language Settings and How to Change Language
How to Save and Turn Off Autosave -
New Features
Changes from the Original Game Sound Player and How to Unlock
Breezy Mode and Difficulty Settings Storage Box
Monster List: How to Check Enemy Stats List of Triple Move Attacks
How to Fill the Action Gauge Fast All Toad Assist Bonuses and Best Bonus
How to Fast Travel Special Enemies Explained
List of Ally Buffs -
Best Guides and Tier Lists
Character Tier List Best Party
Best Weapons Best Armor
Best Accessories Best Equipment
Best Special Moves Best Triple Moves
Post-Game Guides
All Post-Game Equipment All Post-Game Content and How to Get 100% Clear
All Post-Game Boss Rematches and How to Unlock How to Get All Gold Medals in the Play Report
How to Use Stay Vouchers -
Farming Guides
How to Farm EXP How to Farm Coins
How to Farm Frog Coins How to Farm Flower Points
Rare Items and Collectibles
List of All Collectibles All Hidden Chest Locations
Invincibility Star Locations Mushroom Kingdom Hidden Chest
Belome Temple Treasure Room Key Location 3 Musty Fears Flag Locations
How to Get the Lazy Shell Armor and Weapon All Flower Locations
How to Get Last Forest Maze Hidden Chest -
Secrets and Easter Eggs
All Secrets and Easter Eggs What is Peach's ???
What Does the Mushroom Kingdom Inn Kid Do? How to Get Fat Yoshi
All Wishes on Star Hill How to Open the Door in Monstro Town
What Does the Dream Cushion Do? How to Get the Secret Ending
Samus Cameo and How to Find Link Cameo and How to Find
How to Promote Apprentices -
FAQs and Tricky Points
What is the Max Flower Points Total? What is the Max Level?
Can You Increase Max Coins? Can You Increase Inventory Size?
How to Go Into Pipes Should You Give Back the Wallet?
Should You Confess to Stealing Treasures? Booster Tower Trap Room Guide
Where to Get Frogfucius's Snack How to Knock Down the Marrymore Church Door
Should You Give the Star to Speardovich? How to Duck and Slide to Get the Pipe Vault Frog Coin
Super Mario RPG Remake Review: Is it Worth It? Can You Respec?
How to Get Secret Chest in Kero Sewers Can You Get the 7th Star Piece?
What Happens When You Die? -
Useful NPCs
Frog Coin Emporium Items and How to Get All Cards Moleville Swap Shop: What to Trade Points For
Treasure Hunting Toad Guide Mushroom Boy Shop: All Rare Mushrooms

Super Mario RPG Minigames

All Minigame Guides
Midas River Goomba Thumping
Yoshi Racing (Mushroom Derby) Mine Car (Moleville Mountain)
Beetle Mania Yoshi Egg (Wheeere's Yoshi?!)
Booster Hill Booster Family Order
Sky Bridge Paratroopa Cliff Scale
Melody Bay Tadpole Songs Belome Temple Fortune
Sunken Ship Puzzles Sunken Ship Password
Knife Guy's Juggling Game Grate Guy's Casino
Marrymore Hotel Bellhop Minigame Marrymore Wedding
Dodo Statue Curtain Minigame
6 Doors (Bowser's Keep Trial Course) Bowser's Keep Action Course
Bowser's Keep Battle Course Bowser's Keep Puzzle Course
Dr. Topper Quiz Barrel Counting Puzzle
Triathlon Puzzle Coin Collecting Puzzle
Magic Buttons Puzzle Ball Solitaire Puzzle
Message Boards
Minigame Records Board -

List of All Minigames and Rewards

Super Mario RPG Game Mechanics

Game Mechanics and Stat Guides
All Characters by Stats Stats Explained
Level Up Bonus Explained Bonus Flower Effects and How to Get
How to Flee From Battle List of Controls
Element Guides
Element Explained and List of Moves by Element Jump Moves
Fire Moves Thunder Moves
Ice Moves Neutral Moves
Status Effect Guides
List of Status Conditions Sleep
Poison Fear
Mute Mushroom
Scarecrow -

All News Articles

Comment

Post (0 Comments)

Author

Super Mario RPG Walkthrough Team
This article was created by Game8's elite team of writers and gamers.
    Leave feedback(Login required)

    Walkthrough Menu

    Walkthrough

    Story Walkthrough

    Characters

    Playable Characters

    Bosses

    1st Star Piece Bosses

    2nd Star Piece Bosses

    3rd Star Piece Bosses

    4th Star Piece Bosses

    5th Star Piece Bosses

    6th Star Piece Bosses

    7th Star Piece Bosses

    Non-Story Bosses

    Post-Game Rematch Bosses

    Weapons

    Armor

    Accessories

    Maps and Locations

    1st Star Piece Locations

    2nd Star Piece Locations

    3rd Star Piece Locations

    4th Star Piece Locations

    5th Star Piece Locations

    6th Star Piece Locations

    7th Star Piece Locations

    Tips and Tricks

    Gameplay Tips and Tricks

    New Features

    Best Guides and Tier Lists

    Post-Game Guides

    Farming Guides

    Rare Items and Collectibles

    Secrets and Easter Eggs

    FAQs and Tricky Points

    Useful NPCs

    Minigames

    All Minigame Guides

    Minigame Records Board

    Hidden Treasure Chests

    Game Mechanics

    Game Mechanics and Stat Guides

    Element Guides

    Status Effect Guides

    Enemies and Monster List

    Items

    Special Moves

    Enemy Attacks

    Latest News

    News and Updates

    All Super Mario Walkthroughs

    Super Mario RPG JP Wiki (日本語)

    Rankings

    Popular Articles
    Message Board
    • We could not find the message board you were looking for.

    Gaming News

    Girls' Frontline 2: Exilium Review | Where Have You Been All My Life?

    Girls' Frontline 2: Exilium Review

    Popular Games

    Recommended Games

    All rights reserved

    © Nintendo/SQUARE ENIX Characters: © Nintendo, © SQUARE ENIX

    The copyrights of videos of games used in our content and other intellectual property rights belong to the provider of the game.
    The contents we provide on this site were created personally by members of the Game8 editorial department.
    We refuse the right to reuse or repost content taken without our permission such as data or images to other sites.