Ninja Arts: Camouflage (忍法・隠れ身の術 Ninpō kakure mi no jutsu?, lit. "Ninja Technique: Art of Hiding") is a technique that appears in the Sonic the Hedgehog series. It is a technique used by Espio the Chameleon where he turns himself invisible and becomes virtually invulnerable.
In the console/PC version of Sonic Generations, when using Ninja Arts: Camouflage, Espio shouts the technique's name and uses his innate chameleon abilities to blend in with the environment, essentially turning himself nearly invisible, while giving off transparent green leaves that swirl around himself. However, the flaw of this technique is that it requires Espio's concentration to be maintained, meaning it will falter should he lose focus.
In gameplay, Ninja Arts: Camouflage only appears during the Challenge Act Espio: Master of Camouflage. Notably, while using this technique, Espio cannot be targeted by the player, avoid any attacks directed at him as if he was intangible, and move long distances in an instant, similar to teleportation. In addition, lasers pass directly through him. However, should Espio be blinded by spotlights, he will lose his concentration and become visible, leaving him vulnerable to targeting and harm.