Here is the full list of all 14 Montgomery Fox and the Case of the Missing Ballerinas trophies - there are 8 bronze, 3 silver and 3 gold.
Finish hidden object scene in under 300 seconds.
Finish hidden object scene in under 180 seconds.
Finish hidden object scene in under 90 seconds.
Finish Ball minigame.
Finish Color minigame.
Finish Chase minigame.
Finish Jigsaw minigame.
Finish Circles minigame.
Collect your first Collectible.
Collect at least half of Collectibles.
Collect all Collectibles.
Use Hint for the first time.
Use Hint 50 times.
Finish the Game.