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
Complete all Fale Quests
Completed 10 Sidequests
Successfully complete a 1000+ hit combo
Unlock a Cage and Rescue a Friend
Earn a Four-Star Rating in any Challenge Arena
Completed 5 Sidequests
Defeated Lady Tethys
Kill an enemy with the slide attack
Bug Matti
Simultaneously Kill 6 Enemies with a Single Bomb
Opt out of putting poison ivy into Gianni's laundry
Reign chaos by putting poison ivy into Gianni's laundry
Successfully Parry with less than 10% health remaining
Defeated Fuse
Kill 500 Enemies
Craft an item from a blueprint
Meet Haley
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