Join 2 models in 1?

good to all, I bought 2 characters with their blueprints and animations with what I needed already done, then one makes the grabs in places to climb etc and the other is an archer, as I fuse the model and add it to the other so I can do everything with just 1? can or will I have to copy everything from one to another? Thanks

You will provably have to vopy one into another manualy. They most likely have different skletons with different bone names and all.