Here is the full list of all 56 KINGDOM HEARTS FINAL MIX trophies - there are 49 bronze, 4 silver, 2 gold and 1 platinum.
Synthesize 3 types of items.
Synthesize an item for the first time.
Clear gummi ship mission 2.
Shoot down over 2,500 enemies with your gummi ship.
Clear all gummi ship routes.
Seal the keyhole in Hollow Bastion.
Seal the keyhole in Olympus Coliseum.
Win the Hercules Cup.
Win the Pegasus Cup.
Obtain the Oathkeeper Keyblade.
Open 100 treasure chests.
Escape from Monstro.
Seal the keyhole in NeverLand.
Complete any solo challenge.
Win the Phil Cup.
Defeat over 2,000 Heartless.
Seal the keyhole in Halloween Town.
Obtain over 10,000 Munny.
Seal the keyhole in Atlantica.
Seal the keyhole in Agrabah.
Seal the keyhole in Traverse Town.
Seal the keyhole in Deep Jungle.
Modify a gummi ship and update the data.
Seal the keyhole in Wonderland.
Clear gummi ship mission 1.
Obtain all trophies.
Clear Final Mix on Proud.
Clear game on Final Mix or a higher difficulty level.
Clear game on Final Mix: Beginner or a higher difficulty level.
Clear the game without changing equipment.
Clear the game without using a continue.
Defeat the World of Chaos in the End of the World within 15 hours.
Defeat the Mysterious Man in Hollow Bastion.
Defeat the Phantom at the Clock Tower.
Defeat Kurt Zisa in Agrabah.
Win the Hades Cup.
Defeat the Ice Titan in the Gold Match at Olympus Coliseum.
Defeat Sephiroth in the Platinum Match at Olympus Coliseum.
Complete any time trial challenge.
Get Sora to Level 100.
Seal the keyhole in 100 Acre Wood.
Collect all Jiminy's Journal entries.
Collect all Story entries in Jiminy's Journal.
Collect all Ansem Reports in Jiminy's Journal.
Collect all Character entries in Jiminy's Journal.
Collect all 101 Dalmatian entries in Jiminy's Journal.
Collect all Trinity List entries in Jiminy's Journal.
Collect all Mini-game entries in Jiminy's Journal.
Synthesize all items.
Synthesize 15 types of items.
Synthesize 30 types of items.
Obtain 30 or more gummi ship blueprints.
Clear gummi ship mission 3.
Obtain all Keyblades.
Obtain all staves.
Obtain all shields.