Because the death animation is 0500.
Something roughly like:
#1000
FLJ0444:1001
FL+0444
BOA0000
WAI0040
BOA0100
END
#1001
FLJ0666:1002
FL+0666
(...)
Something such. But... most major bosses' death scripts are locked at event 1000, IIRC?
Thank you. I'll go write this down in my own mod and then test it out to see if it works.