Blox Fruits: How to Complete the Colosseum Emperor Secret

Colosseum Island holds one of the more demanding Island Secrets added in Blox Fruits Update 30, and it is a straight fight rather than a puzzle. The Colosseum Emperor watches the arena from above and will throw three escalating waves of gladiators at you, with no checkpoints between them.

Quick answer: Speak to the Colosseum Emperor on the balcony above the arena, select Yes!, then defeat all three waves of gladiators without dying. When the completion message appears, return to the Emperor to collect your EXP and the island Star.

Where to find the Colosseum Emperor and start the fight

The Emperor is not on the arena floor. He sits on a raised throne balcony inside the Colosseum itself, overlooking the sand where the gladiators spawn.

Enter the Colosseum and get up to the balcony level. Air Jump or use a flight ability to reach the throne area above the arena floor.

Walk up to the NPC labelled Emperor and interact with him. He challenges you to face his gladiators, and the dialogue gives you two choices.

Pick Yes! to accept. Selecting Nevermind backs out without penalty. Once you accept, drop into the arena below and the Wave 1/3 counter appears.

Set your loadout before you talk to him. Swapping fruits or moves mid-fight means standing still while gladiators hit you, which is the fastest way to lose a run.

Kitsune ability panel open with hotbar slot 2 highlighted while standing in the Colosseum arena — The ability panel open in the arena, with the second hotbar slot selected before the wave begins. Image: Gamer Robot Inc.

All three gladiator waves and enemy counts

Each wave doubles down on the last one, both in numbers and in enemy quality. The counter in the corner of the screen tracks how many you have left in the current wave.

Wave	Enemies	What spawns
Wave 1/3	2	Gladiators
Wave 2/3	4	Gladiators and Upgraded Gladiators
Wave 3/3	6	Gladiators, Upgraded Gladiators, and a Supreme Gladiator

The exact mix in each wave can shift slightly, but the totals stay the same. The gladiators are no pushover either. In a run by a level 906 player, both the Gladiator and Upgraded Gladiator enemies were labelled Lv. 900.

Wave 1 of 3 in progress with the Kitsune fruit highlighted on the hotbar — Wave 1/3 underway, with the Kitsune fruit selected on the hotbar ahead of a transformation. Image: Gamer Robot Inc.

Clearing the waves without wiping

There is one rule that governs the whole challenge. If you die at any point during the waves, all progress resets and you start again from Wave 1 after talking to the Emperor once more.

Open with wide, high-damage area moves. A fruit with strong crowd damage and mobility clears Wave 1 quickly. Kitsune works well here because Transformation, Tails of Burning Agony, and Wild Assault hit multiple gladiators at once while keeping you moving.

In Wave 2, stay airborne or keep circling. Four enemies, including Upgraded Gladiators, will surround you if you stand still on the arena floor and trade melee hits.

Wave 2 of 3 continuing with the second Kitsune hotbar ability active — Wave 2/3 in progress, with the second Kitsune hotbar ability active against the upgraded gladiators. Image: Gamer Robot Inc.

Watch the on-screen enemy counter, not the arena. It shows exactly how many are left, for example Enemies defeated: 3/4, so you know when a wave is nearly done and when one enemy is unaccounted for.

Blue Kitsune attack effects in the arena with the counter reading Enemies defeated 3 of 4 — The enemy counter reading 3/4 mid-wave, which tells you one gladiator is still alive somewhere. Image: Gamer Robot Inc.

For Wave 3, expect six enemies including a Supreme Gladiator. Thin out the regular Gladiators first so you are not being chipped from every angle while dealing with the tougher spawns.

Note: Gladiators sometimes get stuck inside the arena walls or up on the surrounding balconies. The wave will not advance until they are dead, so fly up and hunt down anything the counter says is still alive.

Claim the reward and confirm the Star

Killing the last gladiator in Wave 3 ends the challenge immediately. A message appears reading Completed! Claim your reward from the King., which is your confirmation that all three waves registered.

Head back up to the balcony and speak to the Emperor again to collect the EXP payout and the Star for this secret. If you never see the completion message, the run did not finish, and one enemy is almost certainly still alive somewhere in the arena.

Colosseum arena moments after the final gladiator wave is cleared — The arena after the final wave falls, just before returning to the Emperor for the reward. Image: Gamer Robot Inc.

Why the challenge fails or resets

You died during any wave. Progress wipes fully, and you must re-accept the challenge from the Emperor.
An enemy is glitched into a wall or on an upper balcony, leaving the wave counter frozen.
You selected Nevermind in the dialogue, so the waves never started.

The Emperor fight is one of three secrets on Colosseum Island, alongside the four fighting-style statues outside and the 1v1 crowd event. Every Island Secret you finish awards a Star, and collecting all 40 across the First Sea unlocks the Teleporter in Middletown.