Spy Guys are flying sentry robots seen in Lair of the Golden Queen and the Ultimate Weapon. They have the appearance of flying eyeballs resembling the Queen's Golden Wings projectiles, and though can't be fought or attack on their own, have the ability to sound the alarms when finding a Skylander and force them to retreat. The only way to defeat a Spy Guy is by crushing it with nearby scenery.
In The Ultimate Weapon, they serve as maintenance instead of security and are only seen flying around the level fixing random pieces, and have a slightly different appearance.
- Their name might be a reference to the Shy Guys from the Super Mario Bros. frachise.