Whole Cake Island Guide Grand Piece Online Guide, Location, Puzzles & More!

Whole Cake Island is one of the newest additions to the Second Sea in Grand Piece Online, and it quickly became a favorite spot for leveling and farming rare items. This island is packed with boss fights, puzzle-based dungeons, and server-wide mini-games that reward XP, Infamy boosts, and exclusive weapons.

If you are planning to explore this area efficiently, this guide covers everything you need to know, from reaching the island to clearing the tower and unlocking its best rewards. Also check out our GPO Codes for more rewards!

How to Reach Whole Cake Island in Grand Piece Online

Whole Cake Island is located in the Second Sea. To get there, start from Rovo Island, which acts as the Second Sea starter area. From Rovo Island, sail southwest for about 30 to 40 seconds.

The island sits between Reverse Mountain and the Rough Waters. Since Whole Cake Island is massive, it is very easy to spot once you are heading in the right direction. You do not need special conditions or items to access it, just a Log Pose and a clear sailing path.

Whole Cake Tower Dungeon Overview

The main attraction on Whole Cake Island is the Whole Cake Tower. This dungeon consists of five floors, each featuring puzzles or boss encounters. Completing all five floors unlocks access to the Mirror World, where the final boss awaits.

Floor 1 – Cake Assembly Puzzle

On the first floor, your task is to prepare cakes for Big Mom in the correct order. You will be asked to serve three different cakes:

• Strawberry Cake
• Mocha Cake
• Cookies & Cream Cake

Each cake must be built by stacking the correct colored layers found around the room. Always place the largest layer at the bottom, followed by the middle layer, and then the smallest layer on top. If done correctly, the cake will vanish and Big Mom will request the next one.

Floor 2 – Color Portal Challenge

This floor tests your observation skills. The room will show a specific color through objects like candles, tombstones, or even the floor itself. Your goal is to enter the portal that matches the displayed color. Each room may change the way the color is shown, so pay close attention before moving forward. Choosing the wrong portal sends you back.

Floor 3 – Sunflower Pattern Puzzle

At the center of this area stands a large tree with glowing orbs rotating around it. These orbs follow a specific color sequence. Look carefully at the order of the colors, then move to the edge of the garden and touch the sunflowers in the same sequence. Completing the pattern correctly unlocks the path to the next floor.

Floor 4 – Juice Empress Boss Fight

The fourth floor introduces the Juice Empress boss battle. You must defeat her along with her summoned minions. Possible rewards include:

• Juice Empress Cape
• Juice Empress Helmet
• Juice Empress Outfit
• Helix Skewer

This fight focuses on crowd control, so AoE damage helps a lot.

Floor 5 – Big Mom Boss Fight

The final floor pits you against Big Mom herself. This is the toughest fight in the tower and requires good coordination. Big Mom can drop:

• Big Mom Outfit (Male or Female)
• Big Mom Hat
• Big Mom Cape
• Soul Cleaver

The Soul Cleaver is extremely rare, making this fight one of the most farmed encounters on the island.

Mirror World and Mochi Emperor

After defeating Big Mom, your Log Pose will point toward a giant mirror. Interacting with it transports you to the Mirror World, where you can challenge the Mochi Emperor. Rewards from this boss include:

• Mochi Emperor Outfit
• Mochi Emperor Scarf
• Mochi Trident

This boss is highly mobile, so fast reactions and burst damage are important.

Recommended Builds and Team Setup

For smoother clears, strong Devil Fruits like Mochi, Pika, and Buddha work very well. Combat styles such as 3SS and Electro are effective, especially against bosses. For swords, Golden Staff or Gravity Blade are solid options. Running the tower with friends is highly recommended, as it speeds up clears and reduces the risk of failing boss fights.

Chocolate Marshmallow Mini-Game Explained

Whole Cake Island also features a server-wide event called the Chocolate Marshmallow Mini-Game. During the event, players collect marshmallows from the chocolate river and stack them onto a large fountain. Once enough marshmallows are added, Big Mom consumes them and rewards everyone with:

• 15 minutes of double drop rates
• 15 minutes of double XP
• A small chance to receive a random Devil Fruit

There is a 15-minute cooldown after each event, and players cannot server-hop during this timer.

Whole Cake Island stands out as one of the most rewarding locations in Grand Piece Online’s Second Sea. With puzzle-based progression, multiple boss fights, rare weapon drops, and powerful XP boosts, it offers something for every type of player. Whether you are grinding levels, hunting exclusive gear, or farming Infamy, mastering Whole Cake Island will significantly boost your progress in the game.