The Invisible Robot was sent to terrorise the Tropical Jungle Zone. It initially managed to knock down Sonic, although Sonic was immediately on his feet again. The robot was defeated when Sonic first drenched it with water and then covered it with vine leaves, making it visible and obscuring its own visual circuits. Then he hit it with a Spin Attack, damaging the cloaking device, and knocked it into a lake so that the exposed wires made it short circuit.