Here is the full list of all 31 Dust: An Elysian Tail trophies - there are 16 bronze, 8 silver, 6 gold and 1 platinum.
Unlock all other Trophies
Complete the Game on Tough or Hardcore setting
Defeat General Gaius
Destroy every enemy Cannon
Hang out with Twelve Friends in the Sanctuary
Earn a Four-Star Rating in EVERY Challenge Arena
Completed 20 Sidequests
Fulfill Bopo's wish for snow
Defeated Baron Kane
Defeated Lady Tethys
Complete all Fale Quests
Completed 10 Sidequests
Kill an enemy with the slide attack
Opt out of putting poison ivy into Gianni's laundry
Completed 5 Sidequests
Reign chaos by putting poison ivy into Gianni's laundry
Bug Matti
Craft an item from a blueprint
Meet Haley
Earn a Four-Star Rating in any Challenge Arena
Defeated Fuse
Kill 500 Enemies
Simultaneously Kill 6 Enemies with a Single Bomb
Successfully Parry with less than 10% health remaining
Successfully complete a 1000+ hit combo
Unlock a Cage and Rescue a Friend
Level Up by Assigning Skill Gems
Successfully complete a 200+ hit combo
Use the DUST STORM on Fidget's Projectiles
Unlock a Treasure Chest
Pick Up an Ability Orb