Event pack
Event packs are Yaz0-compressed SARC archives that contain event flows and related resources. Their file extension is beventpack (or seventpack when compressed).
Contents
Actor
This directory is found in the unpacked content files, Bootup.pack, TitleBG.pack, actor packs, event packs, and dungeon packs.
Its canonical resource path is "Actor".
In the add-on content, it is found in dungeon packs.
The Actor directory contains files defining the actor objects that populate the game world (e.g. enemies, buildings, NPCs). It also includes configuration files for the actor and AI system.
In particular, event packs sometimes contain bas files in Actor/AS.
Camera
This directory is found in TitleBG.pack and event packs.
Its canonical resource path is "Camera".
Camera contains camera animation files for in-game demos (cutscenes).
Demo
This directory is found in TitleBG.pack and event packs.
Its canonical resource path is "Demo".
Demo contains configuration files for in-game demos (cutscenes).
Effect
This directory is found in the unpacked content files, Bootup.pack, TitleBG.pack and event packs.
Its canonical resource path is "Effect".
EventFlow
This directory is found in Bootup.pack, TitleBG.pack and event packs.
Its canonical resource path is "EventFlow".
EventFlow contains event flow files: event flowcharts (bfevfl) and timelines (bfevtm).
Model
This directory is found in the unpacked content files, TitleBG.pack and event packs.
Its canonical resource path is "Model".
In the add-on content, it is found in dungeon packs (see Content/Pack).
Sound
This directory is found in the unpacked content files, Bootup.pack, TitleBG.pack and event packs.
Its canonical resource path is "Sound".
In the add-on content, it is found in _.
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.