Perchance is there an easy way to port an MMD model to TU?

I have multiple MMD models (specifically Pokemon Master models) I’d like to port to Tower Unite, and was wondering if there was any easy way around it as myself and a friend of mine would love to be Silver and Ethan in TU. The MMD models are already rigged, I know TU uses a custom skeletal mesh, but was wondering if there was an easy alternative than learning how to rig.