There's a YouTuber that I watch named "Knight Of the Wind" who is currently doing a Let's Play on Sonic Adventure 2 and in Episode 14 of the Let's Play he said that he is learning game design and he is making his own Chao Garden game based off of Sonic Adventure 2's Chao Garden.
Here is the link to his channel: https://www.youtube.com/channel/UCrlI_g ... NfZOoeGflA