Fearsome Boss

The Fearsome Boss is a treasure that is unlocked when the player scans the Bowser amiibo from the Super Mario 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 Fearsome Boss in that spot.

Trivia

 * While Olimar uses the term "boss" in reference to bosses in the workplace, it also describes Bowser's status as an iconic boss character in gaming.