Devious Drencher

The Devious Drencher is a treasure that is unlocked when the player scans the recolored Inkling boy amiibo from the Splatoon series. It looks just like the amiibo, and is worth.

Collecting the treasure
After scanning the amiibo on the area selection screen (in any sector), the treasure will appear in one of the Secret Spots of the area. Then, the player has to retrieve the Devious Drencher in that spot.

Trivia

 * Olimar's notes on the treasure mock the fact that in the Splatoon games, Inklings cannot swim and will dissolve when they fall in water.