Splatoon 3
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Final Site Boss Guide - How To Defeat the Last Boss

Splatoon 3 | Final Site Boss Guide - How To Defeat the Last Boss

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Splatoon 3 | Final Site Boss Guide - How To Defeat the Last Boss - GameWith

The guide of the Boss at Final Site of Hero Mode in Splatoon 3. Includes how to defeat the last boss, the attack patterns and how to rechallenge.

▶Final Boss Guide (Spoiler Alert!)

*Spoiler alert! It includes the information about the Final Boss!

Table of Contents

The Rewards for Defeating the Last Boss

The Ursine Anomaly - #03 Mr. Grizz

Mr. Grizz
Hero Mindset ReplicaHero Mindset ReplicaHero Suit ReplicaHero Suit ReplicaHero Boot ReplicaHero Boot Replica
Hero Shot ReplicaHero Shot Replica

How to Defeat & Attack Patterns in the First Half

Steps to Defeat

Collect Golden Eggs to destroy the core and open the path.
Approach Mr. Grizz while collecting Golden Eggs.
Shoot and destroy the white ink on Mr. Grizz's body.
Hit the core that comes out with Golden Eggs.
Repeat the above 3 times.

Other Enemies Also Appear


Other enemies also appear on the way to the boss. Since it'd be hard to collect the Golden Eggs or attack the Boss while avoiding both the attacks from the boss and the other enemies, make it a priority to deal with the other enemies.

Missile Bomb

Mr. Grizz will throw the missiles to you. You can easily shoot them down, so be positive to deal with. You can avoid them by hiding behind an obstacle, or by moving away from them as soon as they get close, but you may be sprayed with enemies' ink.

Throwing Slashes

Mr. Grizz throws five slashes towards you by swinging his arm. Be calm and escape from the gaps between the slashes. After the cores of Mr. Grizz's actual body get destroyed twice, he may send slashes in rapid succession at you, but no need to be panic, just avoid them one by one.

Swinging Arms Down

Mr. Grizz swings his arm down in front of you. It will be used while his actual body getting attacked, so move away from him once you see the motion of swinging his arms up. Since the range is quite wide, be sure to move away as far as possible.

Rocket Rolling

The rocket at your feet will spin sideways. This is gonna occur twice: once when Mr. Grizz's first core is destroyed, and once when Mr. Grizz's second core and another core are destroyed. You wouldn't get attacked by Mr. Grizz during the rocket rolling, only need to move around to avoid being fallen.

You can deal with other enemies later

If yo deal with the other enemies, you won't be able to move in time. You have to focus on moving when the rocket rolls, and don't worry about the enemies, they won't chase you.


After releasing a wave, Mr. Grizz will launch a laser in the same range. Move out of range as soon as you see the wave. There's a little time between the wave and the laser, so you can avoid it even by walking.

Triple Inkstrike

The same Triple Inkstrike as the Special Weapon. There isn't much time between when the bomb lands and when it explodes, so be ready to avoid it as soon as you hear Mr. Grizz throw a bomb.

How to Defeat & Attack Patterns in the Last Half

Steps to Defeat

You fail if you don't defeat him within 3 mins and 33 secs.
Get into the ship and approach the core while avoiding obstacles.
Get off the ship when other enemies appear to fight them off.
Suck in cores.
Repeat the above 4 times.
Fire shots to Mr. Grizz to defeat him.

If you don't defeat Mr. Grizz within 3 mins and 33 secs, you'll have to start over after a special movie. You don't need Power Eggs to continue, so if you want to watch the movie, you could just wait for the time limit.

Other Enemies Appear

A couple of enemies will appear on the ship. You can't proceed without defeating them, so deal with them as soon as they appear.

Swinging Arms Down

An attack when the bear's core is being sucked. Move to pass under the armpits after he raises his arms to avoid the attack while staying close.

The Core Appears

If you are far from Mr. Grizz, a core will appear between you and him. You need to get close to Mr. Grizz by avoiding through the gaps.

How to Rechallenge After the Completition

You Can Challenge Via The Wooden Bear

Rechallenge the final site

When you talk to the wooden bear at Site 1 after completing Hero Mode, an option to challenge the Final Site will appear. There is no special reward, but you can use it when you want to challenge the last boss again.

Where the wooden bear is?

location of wooden bear

The wooden bear is placed behind the drum next to Agent 1 and Agent 2 at the Squid Sisters Camp of Site 1.

Every Stage Can Be Skipped

Every Stage Can be Skipped

After entering each stage, a skip option will appear on the menu. You can skip other stages and only fight the boss again.

Related Articles

Top Page Link
Splatoon 3 Wiki Guide

Hero Mode Related Articles

Hero Mode Guide
Hero Mode Walkthrough
Hero Mode Walkthrough
Post Hero Mode Contents
Post Hero Mode Contents
Hero Gear Upgrade
Hero Gear Upgrade
Collect Power Eggs
Sheldon Drone Guide Secret Kettle Guide
All Sardiniums
All Sardiniums
Sunken Scroll Locations
All Sunken Scrolls
All Gold Records

Beginner's Tips & Guides

System Related Guides

The Shoal UsesFreshest Fits Guide
How to Transfer DataHow To Use Locker Room
How to UpdateHow to Talk
Battle Replays GuideHow to Get Stickers
Decorations ListSplashtag & Banner Guide
How to Use EmoteSplatNet Delivery Guide
SplatNet Gear Shop Guide Money Farming Guide
How to Increase Level Fastamiibo List
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How to Get CrownsHow to Deal With Communication Errors
How to Upload IllustrationsGeneral Shop Guide
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