A smart missile was a weapon created by The Trickster. Not only could the missile track down its target and follow it relentlessly, but it could talk freely and shoot lasers from its mouth.
The missile chased Sonic the Hedgehog through the Metropolis Zone and revealed that the hedgehog must solve a series of riddles to get the chance to deactivate it. The first task saw the missile free Mr Fry from the Metropolis City High Security Prison and somehow created a new Badnik in the Metropolis City Scrapyard. Sonic was then faced with a decision; he was allowed to pull one wire, one deactivating the missile, the other causing it to explode. Fortunately, Tekno the Canary (actually The Trickster in disguise) shut the missile down with a simple remote.