This sounds pretty cool! I don't know if a lot of people around here are going to have those consoles to try this on, so I rounded up some screenshots from your project, which do in fact look like Battery Check:
a b c d e
And also your fairly recent progress checklist: here
You mentioned finding our JJ2 file format documentation and applying it to Battery Check, which is indeed quite similar. I wanted to be sure you had also seen Jerrythabest's work documenting all the different events in Battery Check and what their respective parameters do. Love & Thunder would be another good person for you to talk to in this regard, having been studying how Battery Check and its various objects work in a lot of detail these past few months.
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