*I do not take credit for this solution, This was posted on Playstation trophies org. I added the link below as Citation. There was no author listed on the site to credit for this solution.
Edit: i believe the author to be dcollins22http://www.playstationtrophies.org/game/puppeteer/trophy/691...
This trophy is unlocked in Act II, Curtain I. There are a total of 4 butterflies that need to be cut with the Calibrus. You must first find the Catepillars and then press R2 on them with Pikarina to turn them into butterflies. they will then slowly fly away so make sure you cut them down straight away with Calibrus by pressing Square
See the below video by Wozamil for their exact locations in the level-