Bump, with an update:
The problem ISN'T the bones, but the animations.
I know because the animation in the video ISN'T AMMY'S idle animation!
clearly the problem, then, is in the header of the dat, and not either brres...
The dat header for Ammy is this monster:
And Oki's is this one here:
I'd love some help figuring them out...
Edit: And here are 3 unused models I've found: