Pikmin 4 - Ancient Sirehound True Final Boss Guide

Ancient Sirehound true final boss guide for Pikmin 4, including the post-game boss' Piklopedia data, moves and countermeasures, strategy to beat it, and other useful tips.

Pikmin 4 - How to Unlock the True Ending

Ancient Sirehound True Final Boss Guide for Pikmin 4

Pikmin 4 - True Final Boss (Louie and Giant Dog)

The true final boss of Pikmin 4 is the Ancient Sirehound ridden by Louie in the final area Cavern for a King at the Primordial Thicket map region. This massive canine mainly attacks with running tackles and jumping body slams which will require you to move around a lot during the fight.

Once agitated, Ancient Sirehound will imbue itself with different elements to use a variety of area-wide attacks that require to be even more mobile on the battlefield.

Ancient Sirehound Boss Piklopedia Data

Name Family Scientific Name
Ancient Sirehound ??? Deicanis perditum
Location Active Weight
Cavern for a King (Primordial Thicket) Night Unknown
Schnauz’s Notes
To be confirmed.

Pikmin 4 Piklopedia List and Guide

Ancient Sirehound Moves

Move Countermeasure
Jumping Slam Move away.
Rushing Tackle Move to the side or hide behind a stalagmite to cause the boss to get stunned.
Form Change None
Summon Snowballs (Ice Form) Move diagonally as the snowballs will mostly shoot out in cardinal directions around the boss.
Ice Breath (Ice Form) Move around the boss as it will shoot the ice breath while slowly turning sideways.
Electric Fence (Electric Form) Destroy the electric fences as they will severely limit your movement.
Electric Shock (Electric Form) Move away from the glowing spots as these will be struck by lightning.
Fireball (Fire Form) Move away or to the side.
Fire Shockwave (Fire Form) Move away to the farthest edge of the arena or jump over them.
Summon Fire Bombs (Fire Form) Destroy them as they will create shockwaves when the boss’ own fire shockwave touches them.
Acid Scatter (Flight Form) Move along the edge of the arena.
Frontal Acid Shot (Flight Form) Move to the side or away from the shot.

Ancient Sirehound True Final Boss Strategy

Use the stalagamite-like Rocks as cover and attack the boss’ tail when it is stunned.

You can use the large stalagmite-like rocks that fall from above as cover to make the Ancient Sirehound crash into them and become stunned. Afterwards, use Pikmin to attack its yellow tail to force it topple over and lie flat on its back.

During this time, the Ancient Sirehound will expose its belly. Order Pikmin to attack it to damage the boss.

Stay mobile to avoid the projectiles and area-wide attacks that the boss uses.

As fight progresses, the Ancient Sirehound will imbue itself with various elements and use different attacks that fill the entire battlefield. Stay on the move and keep attack its tail until you can force it to lie on the ground again. Target its belly once more to damage it. The boss will eventually go down after a long and somewhat tedious fight.

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