Board Thread:Questions and Answers/@comment-24989822-20141011150403/@comment-679780-20141012001353

You need to raise a Neutral/Run/Run chao. To do this you must give it nothing but "run" based animals which are deer, rabbit and kangaroo. The icons for these animals are depicte din green to help identify them easier.

When your chao evolves it should look like a bright green, bad recolour of Sonic but it's second evolution should have it more like Sonic.