Atlus uses the pm1/2/3 event format for numerous games ranging from nocturne, to dds, to persona 3/4. Internally they are called PMD which stands for Polygon Movie Data.
Feeling like an eager beaver? Jump in to the quick start docs and get making your first request:
{% content-ref url="starting-guide.md" %} starting-guide.md {% endcontent-ref %}
How about diving right into what the different frames do inside pmd
{% content-ref url="type-table-types/frame/" %} frame {% endcontent-ref %}