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