The way the Ratchet & Clank wiki capitalizes words has changed; therefore, this article should be checked, and, if necessary, capitalization should be fixed.
The Gravity Cannon was an item that Slim Cognito showed to a group of female Tumfoids at a rock concert at Meridian City. The authorities caught him with it, thus landing him in Zordoom Prison. It is unknown what a Gravity Cannon is or what is does.
- Ratchet & Clank Future: Tools of Destruction (first appearance)