Here is the full list of all 43 Skylanders Imaginators trophies - there are 30 bronze, 9 silver, 3 gold and 1 platinum.
Earn all other trophies.
Sky Fortress: Use the wrecking ball to destroy every crate on the Vulture Cargo Ship
Fizzland: Remove 9 trees with fizzy bottles
Complete 3 Adventures in Calamity City or Trouble Town
Complete 3 Adventures in Mausoleum of Madness or Danger Dungeon
Equip an Imaginator with all Ultimate Gear
Complete 3 Adventures in Battlefield Blitz, the Battleship, or Operation: More War
Complete Story Mode on any difficulty setting
Complete The Lair of Kaos on any difficulty
The Lair of Kaos: Break Kaos' Gameshow scoreboard by scoring too many points
Complete Abandoned Amusement Park on any difficulty
Abandoned Amusement Park: Destroy 25 falling boulders
Level up any Sensei to level 20
Cradle of Creation: Complete the Gong Challenge without taking any damage
Win 10 Creation Clash Matches
Complete Dragon Temple on any difficulty
Dragon Temple: Visit every island when descending from the temple
Go down a rabbit hole on the M.A.P.
Complete Golden Arcade on any difficulty
Golden Arcade: Score over 4000 points in the Candy Cake Gumdrop Land video game
Complete Fizzland on any difficulty
Acquire an Epic weapon and equip it to an Imaginator
Acquire a Rare weapon and equip it to an Imaginator
Complete Sky Fortress on any difficulty
Beat 10 Troll Radio challenges
Earn 20 Objective Stars
Solve 10 Lock Puzzles
Complete Shellmont Shores on any difficulty
Shellmont Shores: Eat five bunches of bananas
Take a Selfie on the Hall of Selfies
Complete Scholarville on any difficulty
Scholarville: Explode 15 Exploding Barrels and Crates
Earn 10 Objective Stars
Complete 3 Battle Gong challenges
Complete all three Star Objectives on any chapter
Earn 5 Objective Stars
Open 50 Imaginite Chests
Complete Mushroom River on any difficulty
Mushroom River: Leave Eruptor on a raft to ride down the river alone
Acquire an Ultimate weapon and equip it to an Imaginator
Unlock your first Sensei Elemental Realm
Complete Cradle of Creation on any difficulty
Open a Sensei Shrine