I was trying to achieve that initially, but I've had issues with animations used from mechanim. (Puppeting is always an option)
It is the same rig as the rest of my psx characters is what I was trying to say, so you can share animations across them.
The mechanim riddle is one I'd like to solve though, so we can chat via email: flumen.work@gmail.com
Hopefully I can get the mechanim compatibility working with some input from the community.
Thank you for the support and message. Have an awesome day