How to import animations to a new rom

[Mephisto]

I was looking for some mods on pokemon sword and shield and some got my attention, some would change pokemon models even for npc models. I wanted to know how to do that on Pk UsUm and XY, what documents to change to trade the animations. Im new with Blender and this kind of thing, but was doing some animations and wanted to know how to change models and textures on a extracted rom.