This cheat here is very, very useful to raise Chao stats.
1. Stop the Chao from walking, playing etc. (petting might stop it for a while)
2. Grab an animal and go right in front of it. (not too colse or the Chao will take it out of your hands)
3. While the Chao is standing still press B fast to drop it the animal in front of him and if you did it right the animal should bounce back. (repeat with all animals till your Chao really takes it) in otherwards you can't use it no more
Hope this is useful
PS. It will take a while to master this so practice up and happy raising everyone.