Unfloatable Boat

The Unfloatable Boat is a treasure in. It is a toy boat, and as the name suggests, it falls to the bottom of the body of water it is in instead of floating.

Collecting the treasure
It is submerged in the large lake near the center of the Blossoming Arcadia. It is guarded by a Yellow Wollywog, which should be defeated before attempting to collect this treasure, although it is not strictly necessary. To collect this treasure, you must throw 12 Blue Pikmin at it. Attempting to freeze the water will result in the treasure being stuck half-submerged.