Epic Mickey 2: The Power of Two

Once you reach Autotopia you will watch a cinematic to show you the Guardian Syphons in the middle of the area and two ways to free them, you can either thin out cars and place the engines on the air vents or stand on the pressure plates and have Oswald reprogram them. There are a total of 3 Guardian Syphons in Autotopia but the method is always the same, just clear out all enemies in each before dealing with the task at hand and the trophy will unlock when you free the last guardians.