Mobius Encyclopaedia
The subject of this article appeared before the Super Genesis Wave.

A gas-gun.

Gas-guns are handheld non-lethal weapons filled with knock-out gas made by the Dark Presence and are used by both its factions. These weapons were instrumental in knocking out Silver the Hedgehog to stop him from helping King Sonic and the kidnapping of the Prower couple consisting of Tails and Mina. (SU: #6)