The three basic types of Chao, Neutral, Hero, and Dark Chao. These models don't work with motion/pose data, but they do have several morphs and physics.
These models come with .fx files that can be used with MME to activate normal mapping on the models, as shown above. For more information, please see the included help file found in the models' folder.

This download contains models that are only designed for use with MikuMikuDance (MMD).

The original Neutral Chao model was ripped from Sonic Generations by Random Talking Bush.
The Hero and Dark Chao were ripped from Team Sonic Racing by .
I did the conversion work for the MMD models, including modifying the Hero and Dark Chao to be able to use the same morphs as the Neutral Chao.

https://www.deviantart.com/sab64/art/MMD-Model-Chao-Download-849812745