Take the vocaloid 3D characters from MikuMikuDance to Blender, via what appears to be a free set of MMD Tools. Now updated for Blender 2.8x.
As you might expect it’s a little complex, but there’s a detailed tutorial video on the install and conversion for Blender 2.8. Apparently the dance motions are also converted.
I’m not sure quite why you’d want them in Blender rather than their native MMD software, but the tools are being mentioned here because one could probably learn something about building and texturing toon figures by examining one of these inside Blender. Perhaps it’s also possible to give them a makeover and then convert them back the other way, and thus create new non-standard MMD characters?