Here is the full list of all 55 KINGDOM HEARTS Dream Drop Distance trophies - there are 47 bronze, 5 silver, 2 gold and 1 platinum.
Rack up 300 or more Drop Points in a single turn.
Complete all 7 Link Portal bonus objectives.
Earn a score of 1,000 or higher on the Light Cycle.
Connect 6 or more points with a single Faithline.
Defeat 5 or more enemies with a single hit in Slingshot.
Complete The World That Never Was as both Sora and Riku.
Sever all chains with a single slash 3 times in a row using Nightmare's End or Mirage Split.
Activate all of Wonder Comic's effects at least once.
Complete Symphony of Sorcery as both Sora and Riku.
Use every Training Toy.
View all flashbacks.
Earn a score of 200 or higher in the Balloon mini-game.
Complete Country of the Musketeers as both Sora and Riku.
Revisit and complete Traverse Town as both Sora and Riku.
Complete Prankster's Paradise as both Sora and Riku.
Earn a score of 800 or higher in the Candy Goggles mini-game.
Unlock all nodes on any Spirit's Ability Link board.
Trap 6 or more enemies in Bubble Burst.
Complete The Grid as both Sora and Riku.
Earn a score of 400 or higher in the Water Barrel mini-game.
Activate all Code Break commands.
Complete a dive without taking damage.
Win a Flick Rush duel by lining up three 7s.
Complete La Cité des Cloches as both Sora and Riku.
Rescue Spirits 3 times in battle.
Create a party with 3 Spirits and make them all very happy.
Complete Traverse Town as both Sora and Riku.
Create a party with 3 Spirits.
Perform an A-Rank dive.
Defeat the phantom Ursula and begin the Mark of Mastery exam.
Obtain all trophies.
Achieve 100% completion in Combat, Story, Items, and Game Records.
Achieve 100% completion in Combat.
Achieve 100% completion in Story.
Achieve 100% completion in Items.
Achieve a cumulative level of 100.
Drop 100 or more times.
Make a purchase at every Moogle Shop.
Obtain all commands.
Obtain all recipes.
Obtain all Dream Pieces.
Achieve a Rush Level of 20.
Obtain 3,000 or more medals in Flick Rush.
Max out a Spirit's Affinity Level.
Breed a ★ Rank Spirit.
Max out and install all Support and Spirits abilities.
Defeat 4 or more enemies in one turn of Melody Catcher.
Complete all Special Portals in Traverse Town as both Sora and Riku.
Complete all Special Portals in La Cité des Cloches as both Sora and Riku.
Complete all Special Portals in The Grid as both Sora and Riku.
Complete all Special Portals in Prankster's Paradise as both Sora and Riku.
Complete all Special Portals in Country of the Musketeers as both Sora and Riku.
Complete all Special Portals in Symphony of Sorcery as both Sora and Riku.
Complete all Special Portals in The World That Never Was as both Sora and Riku.
Complete all Secret Portals as both Sora and Riku.