Here’s the Chao I used in Sonic Adventure 2 to get all the chao emblems.
They are a Red, Two Tone, Neutral Chaos Chao (I would have gone for shiny, though shiny red two tone doesn’t work properly)

I did use the chao editor to speed up actually making it a Chaos chao, since that’s 2 reincarnations and takes like 10 hours. Though I did at least make sure they did get 1 of every animal, and the happiness requirement.