Pikmin: The After Years/Treasure Hoard

There are 28 total boss treasures (the ones found in the final sublevels of caves). These are all 28:
 * Communication Device
 * Malodorous Napsack
 * Emblazoned Glove
 * Crystallized Rage
 * The Key
 * Torn Universe
 * Hefty Hand
 * Thick Skin
 * Unusual Whistle
 * Titanium Cylindrical Object
 * Brass Knuckles
 * Stick of Light
 * Pulsar Medallion
 * Angel's Wings
 * Dashing Footwear
 * Lens of Identification
 * Packaged Rainbow
 * Alternate Dimension
 * Orb of Darkness
 * Sleek Sheet
 * Emperor Whistle
 * Energy Provider
 * Indescribable Merit
 * Paranormal Laurel
 * Computerized Creativity
 * Transporter
 * Spatial Key
 * The Jewel of Life