Espio the Chameleon

An anthropomorphic chameleon, who mainly serves as an intelligent ninja warrior, spy, and a member of the Chaotix Detective Agency alongside Vector the Crocodile and Charmy Bee. Together, the trio solves whatever cases they are given, where Espio is able to put his skills to good use. He possesses as well the ability to blend in with his environment.

(Source: Sonic Wiki Zone)