Event pack
Event packs are Yaz0-compressed SARC archives that contain event flows and related resources. Their file extension is bactorpack (or sbactorpack when compressed).
Contents
Actor
In particular, event packs sometimes contain bas files in Actor/AS.
Camera
Demo
Effect
EventFlow
Model
Sound
Generation process
Event packs are very likely to be automatically generated. It is also likely that Nintendo's tool determines what files to include based on EventInfo.product.sbyml.