Rockers are a type of Blotworx in Epic Mickey 2: The Power of Two. They are a cross between a car and a unicycle. They are a dangerous type of Blotworx that appear in Disney Gulch, Blot Alley, The Underground and Autotopia. They have the ability to shoot rocket homing missiles that seek you out. To defeat them, you have to smash the bar grill at its front and jump on the button. Once you've done that, this will open up the cockpit and you will have to either thin or paint the Blotling inside.
According to game guides, Rockers are one of the deadliest enemies in the game, especially in groups.