me and my team tried it a few months ago with our Green Screen Project (using a green suit to record our movement and transfer it into Brawl) it worked, but just barely, and it only could work with certain character, you could in theory convert data by doing the old fasion way of manually converting it by doing hours of code work, but I don't think people would be willing to do it, or better yet, they dont have the knowledge of doing it.
So to answer your question, yea, its plasable. But be ready for some serious work
Hours of work? I'm pretty sure it wouldn't be that hard if you got someone with the knowledge of how both animation formats work and with programming knowledge.