Exporting and Importing Assets

Question

So one thing that's been on my mind for a while and I wanted to hear some experienced opinions on the matter.Would it be possible to take assets and resources like models and said models animations and import them from one game into SMT Nocturne?Having played the game so many times and seeing somebody like Zephhyr using resources from the main game to make brand new fusable demons made me curious if the same thing can be done with resources from other games, or is that only doable with resources relative to the game itself?