Decoy is a Power-up for Sly Cooper in Sly Cooper and the Thievius Raccoonus. It allows the player to drop a black Sly Cooper cardboard cut-out, which will fool any guard that sees it and make them attack it, rather than Sly. If you are too close to the guard when you activate the power-up, the guard might accidentally shoot Sly.
This power-up does not appear in any following games. It was invented by Sir Andrew Cooper and can be found in the ninth vault excluding blueprints.