Here is the full list of all 23 The Peanuts Movie: Snoopy's Grand Adventure trophies - there are 11 bronze, 2 silver, 9 gold and 1 platinum.
Get all trophies
Complete all Melody Chateau levels
Find all the kids
Collect all kids objects
Complete all Parisian Underground levels
Unlock the Detective Costume
Unlock all Costumes
Unlock the Joe Cool Costume
Complete all Skies of Paris levels
Collect all Jelly Beans in a single level
Complete all Lunar Surface levels
Have a second player activate a Woodstock trigger
Break through a wall as the Masked Marvel
Unlock the Masked Marvel Costume
Unlock the Flying Ace Costume
Complete all Temple of Bunnies levels
Unlock the Astronaut Costume
Defeat The Mask Boss without being hit
Complete all Peppermint Jungle levels
Unlock the Beagle Scout Costume
Finish a level
Jump on three enemies without touching the ground
Hover as normal Snoopy for more than 5 seconds