I'm not much of a collector, but I have collected all of the PPS butterfly wolves! (I'm not counting the UR peach or the UR Bee right now)
All of the Common - Rare PPS Cocoons (Currently at 30, have all outcomes)
T5 List PPS Cocoons(currently at 3)
Common - Uncommon Caterpillars (Currently at 510, all outcomes)
Rare Caterpillars (Currently at 28, all 3 outcomes)