Pikmin 4 Onion Locations: Every Onion and Where to Find It

A complete guide to all Pikmin 4 onion locations, including every colored Onion across all areas, the Mysterious Cave rewards, and tips for unlocking them.

How Onions Work in Pikmin 4

Onions are the heart of your army in Pikmin 4. Each colored Onion produces matching Pikmin, so tracking down the Pikmin 4 onion locations early makes exploring, retrieving Treasures, rescuing castaways, and collecting Flarlics far easier.

There are 21 Onions in the game when you count Flarlics, but only 10 are colored Onions that spawn new Pikmin types. You pick up your first Onion — the Red Onion — during Exploration Day 1, and by the time you leave the first area you can have up to three fused Onions following you around.

Video: BeardBear

All Onion Locations at a Glance

Here is every colored Onion in Pikmin 4 and where to find it:

Onion	Pikmin Type	Area	How to Reach It
Red Onion	Red Pikmin	Rescue Command Post	Found during Exploration Day 1, left of the Stone of Advancement treasure
Yellow Onion	Yellow Pikmin	Sun-Speckled Terrace	Eastern area, opposite the breakable pots and Dandori Cave
Blue Onion	Blue Pikmin	Sun-Speckled Terrace	Across the water near the second base
Yellow Onion	Yellow Pikmin	Blossoming Arcadia	Southern part, after clearing the Kingdom of Beasts cave
Blue Onion	Blue Pikmin	Serene Shores	Out on the surface
Light Blue Onion	Ice Pikmin	Hero's Hideaway	On the surface — no cave diving required
White Onion	White Pikmin	Mysterious Cave	Reward for the level 5 Dandori Challenge
Purple Onion	Purple Pikmin	Mysterious Cave	Reward for the level 10 Dandori Challenge
Black Onion	Rock Pikmin	Giant's Hearth	Southern area behind the hearth, behind a reinforced wall
Pink Onion	Winged Pikmin	Primordial Thicket	Southeast corner near a Dandori Cave

Details for each location are below, based on the walkthrough information in IGN's Pikmin 4 Onion guide.

Early-Game Onions: Rescue Command Post and Sun-Speckled Terrace

Red Onion (Rescue Command Post): You grab this automatically during your first Exploration Day. It sits to the left of the Stone of Advancement treasure, so Red Pikmin will carry your squad through the opening hours of the game.
Yellow Onion (Sun-Speckled Terrace): Head to the eastern part of the area, across from the breakable pots and the Dandori Cave. The Onion is surrounded by water behind a bulging bag — throw Pikmin at the bag to flatten it and open the way.
Blue Onion (Sun-Speckled Terrace): This one waits on the far side of the body of water, right next to the second base. You'll need 30 Ice Pikmin to freeze the water surface so the Onion can be carried back across.

Surface Onions in Mid and Late-Game Areas

Four more colored Onions are found out in the open as you unlock new regions:

Blossoming Arcadia — Yellow Onion: Located in the southern portion of the map. It becomes accessible after you complete the Kingdom of Beasts cave.
Serene Shores — Blue Onion: Found on the surface of Serene Shores, giving Blue Pikmin a second home Onion.
Hero's Hideaway — Light Blue Onion: This Ice Pikmin Onion lets you grow your frozen army without stepping into caves, which is a huge convenience for surface exploration.
Primordial Thicket — Pink Onion: Sitting in the southeast corner of the area near a Dandori Cave, this Onion keeps your Winged Pikmin ranks full.

Mysterious Cave Onions: Purple and White Pikmin

The Mysterious Cave is a special postgame-style area that only unlocks after you finish Captain Olimar's Shipwreck Tale, the mini-game available once you've rescued Olimar and rolled the first ending. The cave appears at the Rescue Command Post once activated.

Inside, two Onions are locked behind Dandori Challenges:

White Onion: Found on the 5th level of the Mysterious Cave. Clear that floor's Dandori Challenge to claim it.
Purple Onion: Located on the 10th level. Completing this tougher Dandori Challenge rewards you with the Onion, finally adding Purple Pikmin to your roster.

Because these are challenge rewards rather than field pickups, it pays to brush up on your Dandori skills — efficient multitasking and task prioritization — before attempting the deeper floors.

Late-Game Onion: Giant's Hearth Black Onion

The final colored Onion is the Black Onion in Giant's Hearth. It's hidden in the southern part of the area, behind the hearth itself, and protected by a reinforced wall. Bring 3 Bomb Rocks to blast the wall open, then send your squad in to claim the Onion and start producing more Rock Pikmin.

FAQ: Pikmin 4 Onion Locations

How many Onions are in Pikmin 4?

There are 21 Onions total if you include Flarlics, but 10 of them are colored Onions that produce Pikmin: Red, Yellow (x2), Blue (x2), Ice, White, Purple, Black, and Pink.

Where is the Red Onion in Pikmin 4?

The Red Onion is collected at the Rescue Command Post during Exploration Day 1, sitting just to the left of the Stone of Advancement treasure.

How do I get the Blue Onion in Sun-Speckled Terrace?

The Blue Onion is across the water near the second base. You need 30 Ice Pikmin to freeze the water so the Onion can be retrieved and carried back.

How do you unlock the Mysterious Cave?

Complete Captain Olimar's Shipwreck Tale, which becomes playable after you rescue Olimar and finish the story up to the first ending. The cave then appears at the Rescue Command Post.

Do I need Bomb Rocks for any Onion?

Yes — the Black Onion in Giant's Hearth sits behind a reinforced wall that requires 3 Bomb Rocks to break down.

Sources: IGN — Onion Locations, Pikmin 4 Guide