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World 6 of 7

Pikmin 4: Primordial Thicket walkthrough

The last area: win the Final Battle for Nelle, then go down the twenty sublevels of the Cavern for a King.

  • About 214 min in the videos
  • 4 parts · 7 steps
  • 4 bosses

Compiled from 1 playthrough video and 19 guides · checked Oct 19, 2026

0 of 4 done
Video: YTSunny on YouTube. Loads from youtube-nocookie.com only when you press play.

What each player can do here

P1 · Player 1
  • Leads the Rescue Officer, Oatchi and the Pikmin squad: every Pikmin throw, whistle and order is Player 1's.
P2 · Player 2
  • Aims the Pebble Pitcher, an on-screen pointer: pebbles to hit creatures and speed up carriers, plus items earned from the co-op gauge.

If your skill levels differ: Nintendo pitches the Pebble Pitcher seat for someone not ready to lead the squad: the newer player supports with the pointer while the more experienced one runs Player 1. Since update 1.1.0 a Relaxed setting also stops creatures from attacking unless you hit them first. How to split the roles

The Thicket

Part 1 of 4. Reach the Final Battle.

  1. BothThe Winged Pikmin Onion is in the east of the area.single source
  2. BothThe Final Battle cave is reached by having Oatchi rush the potted mushrooms so they grow into stepping stones.single source
  3. BothFinal Battle is the last Dandori Battle, against Louie; winning it gets Nelle back.

The Mud Pit

Part 2 of 4. Beat the Bug-Eyed Crawmad.

  1. BothThe bottom sublevel pits you against a Bug-Eyed Crawmad with two Hermit Crawmads.

Where people tend to fall

  • Freezing the mud floor (about thirty Ice Pikmin) keeps the Crawmad in its hole while you deal with the others.

Subterranean Swarm

Part 3 of 4. Beat the Horned Cannon Beetle and the Sovereign Bulblax.

  1. BothA Horned Cannon Beetle waits on sublevel 3 and a Sovereign Bulblax on sublevel 5.

Cavern for a King

Part 4 of 4. Beat the Ancient Sirehound on sublevel 20.

  1. BothIt opens only after Final Battle is won, Nelle is back, and a new day starts.single source
  2. BothTwenty sublevels deep, the last holds the final boss, the Ancient Sirehound; beating it brings Louie back.

Boss

Bug-Eyed CrawmadThe Mud Pit boss

  1. Eyes: Hit its eyes; with both out it flips over and the underside can be attacked.

Horned Cannon BeetleThe sublevel 3 boss

  1. Clog: As it breathes in, throw a Pikmin (Rock works well) into the hole on top; its back opens for an attack.

Sovereign BulblaxThe sublevel 5 boss

  1. Bomb: Get it to lash its tongue, then feed it a Bomb Rock; once it is stunned, charge in.

Ancient SirehoundThe final boss

  1. Rampage: Bait its charge into a fallen rock to stun it, pull its tail with Pikmin to flip it, then hit the belly.
  2. Ice: It sends out snowballs that bounce off the walls and breathes cold; dodge, get behind it and pull the tail.
  3. Electric: It spits electric balls (Yellow Pikmin break them) and stands still in the centre to make electric fields: that is the moment for the tail.
  4. Fire: Fireballs and rings of flame; the rings always leave a gap behind it, right where the tail is.
  5. Flight: It flies and spreads the same gloom fog as the Smoky Progg; avoid the fog and pull it down quickly.
  • Ultra-spicy spray speeds up every phase.
Sources (20)

Steps compiled from 1 playthrough video and 19 text guides, checked Oct 19, 2026, and written in our own words. We did not play the game for this guide. A step marked “single source” rests on one guide so far.