Here is the full list of all 19 Bat Boy (EU) trophies - there are 4 bronze, 6 silver, 8 gold and 1 platinum.
They'll make a baseball card of you!
Buy an item.
Buy a Golden Seed.
Play a song in the Groovy House.
This room looks familar... It needs more ghosts...
Collect all Cassettes.
Collect every single seed.
All your friends are in the Groovy House.
Collect 999 Crystals.
Deflect 100 projectiles.
Score 5 Homeruns.
Defeat Azaros.
Defeat Azaros for the second time.
Defeat Azaros for the third time.
Defeat Vicious Maximus.
Give Boarman an ingredient to prepare a drink.
Give Boarman all three ingredients to prepare drinks.
Find and rescue a pet.
Find and rescue all pets.