Didn't we cover that on Friday?
https://gbatemp.net/questions/exporting-animations-from-a-model.4949/
Simplest way that is at least worth trying is if there are a bunch of NSBCA files you overwrite (or copy-paste rename) the ones for the item you want with those that you do want. This sort of overwriting is worth trying for just about any file on any system really if you are going between like sorts of files within the same game (or maybe sequel, game from same dev or game on same engine) and trying to duplicate functionality.
Technically there is a more professional way known as a relinking, however you get to do that manually for the DS (the PSP has a nice tool for it) so we can skip that one for testing purposes.
For going between models then while most of the time a dev will work from a common base and have a common design/numbering system/frame of reference between them they don't have to, and the changes done from said base might well still make it different. Alternatively the animations might happen in a different order within a file -- the game does not know to move a leg and will instead be told to call sequence 4 or whatever* and where sequence 4 is a leg on the original it is say a death animation here.
*back when we used to take a copy of the DS game goldeneye's soundtrack and overwrite it in other games to get the size down (we were often still on GBA era carts with 32 megs of memory so space was at a premium, even if you did have SD cards then 2 gigs were "rent for a month" type prices if you could find one at all). For Castlevania I think it was we did that but the game then tried to call what it thought was a jump sound or whatever and instead it was a now a gunshot, which was quite amusing. Same idea here but for animations and also similar can happen to anything you do this for.
Devs are however notoriously lazy (doing as little work by reusing what came before and getting your machine to do as little work as possible is typically a job requirement) so it is usually worth ploughing on ahead anyway.
If it comes to such problems as mentioned above you can dig deeper to figure out what goes. You might not have to understand the file format completely if you can internally relink the file (or overwrite things and sort pointers) and leave it to get on with things so be aware of that one as well.