Full list of all 18 Costume Quest 2 trophies - 15 bronze and 3 silver. It takes around 6-8 hours to unlock all of the trophies on PlayStation 3.
Restored the timeline to save Halloween
Finished the game having fought every battle with Candy Corn in your party
Completed all quests in the game
Used every costume special in combat
Found the Solar System
Mastered all combat techniques from Corvus
Tried every Creepy Treat Card in combat
Collected all Creepy Treat Cards
Got the liberty kids to bust a move
Defeated Ophirion
Found the Wolfman
Used the Pterodactyl Costume to flap 10 flappy things
Upgraded 3 costumes
Defeated Kronoculus and his Kronys
Collected over 4 thousand candies
Bashed 10 Monster Patrols
Tried on 5 different costumes
Used the clown horn 1000 times