The Sonic Cannon That Destroys Every Known Material in the Universe is a weapon that Plankton invented for one of his evil plans. It only appears in the episode "Move It or Lose It."
It is a stationary cannon that fires a blue energy beam.
Role in episode
Plankton, upset that the Chum Bucket might be destroyed, cries beside the sonic cannon, which causes it to activate and make a hole in the Chum Bucket wall. SpongeBob sees through the hole that Plankton is sad and gives him the idea to bribe the Bikini Bottomites so that they will sign a petition to keep the Chum Bucket and destroy the Krusty Krab.