Here is the full list of all 33 Lost Ember trophies - there are 14 bronze, 13 silver, 5 gold and 1 platinum.
Found a weird fashion-shaped thing
Found a weird sphere-shaped thing
Found a weird... shaped thing
Found 70 mushrooms
Found and possessed all available legendary animals
Played all animals
Found a weird triangle-shaped thing
Found the golden statue
Found 50 relics
Found a weird cube-shaped thing
Found 50 mushrooms
Found and possessed 3 legendary animals
Triggered 20 memories
Spent a bunch of time underground
Found 25 relics
Found 30 mushrooms
Found a legendary animals
Played 10 different animals
Damaged over 20 remains from the old days
Spread spores of each mushroom kind
Found a weird tube-shaped thing
Spent a bunch of time underwater
Rolled for a mile
Triggered 5 memories
Got through the Flappy Duckling level
Found an odd mini-game
Found 5 relics
Spent a bunch of time in the air
Had too many berries.
Unlocked all other trophies
Found all mushrooms
Triggered all memories
Found all relics