I'm pretty sure we used Mixamo in last years Jam and it was fine, you can use your own custom meshes with the animations you don't have to use the default ones.
Hey guys, just wanted to clarify the situation with Mixamo. You cannot use the pre-made character from Mixamo, you can however make your own characters elsewhere such as maya, blender or even Adobe fuse and use Mixamo to rig/animate them :)
