How to give an ability to a creature. Auto-translated

Please advise. Using MMarchive, I opened the sprites and text files of the game. I can change the parameters of the monsters. However, I can't give them new abilities. Can you tell me how? At least, how can I make non-archers shoot arrows? The animation for shooting exists; how do I assign the "Archer" skill?

Doctor, you should be focusing on modding, not here.