Here is the full list of all 26 Poi trophies - there are 11 bronze, 7 silver, 7 gold and 1 platinum.
Collect all the Trophies.
Beat the game in New Game+ mode.
Collect ALL the Explorer Medallions.
Find all of the hidden costumes.
Find ALL the Golden Gears.
Take a picture of ALL the creatures.
Find the legendary treasure.
Discover ALL the Locations.
Find ALL the Fossils.
Collect all the Explorer Medallions in Crystal Cavern.
Meet the requirements to open the Mysterious Gate.
Rescue all the baby Pin Birds.
Collect all the Explorer Medallions in Sinking Sands.
Visit the hidden planet.
Collect all the Explorer Medallions in Mount Magma.
Find a hidden hat.
Collect 10 Explorer Medallions.
Collect all the Explorer Medallions in Cozy Canyon.
Take a picture of the Master Explorer.
Hey, watch where you're rolling!
Do a triple jump.
Discover the mysterious travelling merchant.
Sometimes, things don't always go as planned.
Purchase an item from the shop.
Kick a Bucket Head.
Earn your first Explorer Medallion.