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Sardiniums and Power Eggs will be needed in the Splatoon 3 Alterna story mode if players want to upgrade their Hero Gear and their helpful companion, Smallfry. Luckily, this Splatoon 3 guide will cover all the Sardinium locations for all six Sites so that players can fully upgrade their stuff.
Site 1 Sardiniums
Sardinium 1
Found on the northern side of Site 1, just a few steps northeast of the 'Splat You on the Flip Side' Kettle.
Sardinium 2
Splatoon 3 players can find another Sardinium in front of a Maoi statue north of the "What Caused the Big Bang" Kettle.
Sardinium 3
Another Sardinium can be found in a little hidden area in the southeastern corner of Site 1.
Site 2 Sardiniums
Sardinium 1
Look on the top of a metal tower southwest of the "Switching Things Up" Kettle.
Sardinium 2
Look on the ground southeast of the "Switching Things Up" Kettle to find this Sardinium.
Sardinium 3
Walk on the platform beneath the "The Future Stares Back" Kettle to find a breakable wooden box. Players will find the Sardinium inside it.
The Future Stares Back
Beat the boss fight with Frye to earn three Sardinium.
Site 3 Sardiniums
Sardinium 1
Find this Sardinium on a piece of land in the middle of an ice section a few steps west of the "They Said We'd Have Flying Cars" Kettle.
Sardinium 2
Look on the ground a few steps west of the "Ink Wheels-Experience" Kettle.
Sardinium 3
Break the wooden box in the southeastern corner to find another Sardinium.
Site 4 Sardiniums
Sardinium 1
Destroy the ooze towards the front of the submarine to find Sardinium.
Sardinium 2
This Sardinium is buried in the ground east of the "Let's Put a Pin in That" Kettle.
Sardinium 3
Destroy the wooden box next to the "Splash the Block Party" Kettle to find Sardinium.
The Pursuit of the Precious
Defeating Shiver and her Shark buddy will reward players with three more Sardinium.
Site 5 Sardiniums
Sardinium 1
Find one Sardinium by breaking the wooden box atop a platform southeast of the "Too Many Snipers" Kettle.
Sardinium 2
Find this Sardinium buried in the ground south of the "Trouble Round Every Corner" Kettle.
Sardinium 3
Look on the platform underneath the "Zipping over the Neighborhood" Kettle to find some Sardinium buried in the ground.
Site 6 Sardiniums
Sardinium 1
Head onto the skyscraper west of the "Bet You Mist Us" Kettle to find this Sardinium inside a wooden crate.
Sardinium 2
Look near Splatoon 3's "Mission: Fly-Fishin'" Kettle to find another Sardinium.
Sardinium 3
Get rid of the ooze next to the "Dive and Dash" Kettle to find this Sardinium collectible.
The Obscurest Chiaroscurist
Players will earn 3 Sardinium after defeating Big Man at the arena.
Splatoon 3 is available for the Nintendo Switch.