The goblin cannon is a weapon operated by Glob and Glum. It shoots glowing green missiles that explode on contact.
History[]
Scooby-Doo! and the Goblin King[]
Shaggy Rogers and Scooby-Doo are flying towards the Goblin King's castle on Broomie when Glob and Glum fire glowing explosives at them from the ground, which damage Broomie's bristles and cause them to crash in a nearby fairy village.