Sorting type: Most visited Most visited Alphabetical | This category is for any inventions made by Sheldon J. Plankton. Pages in category "Plankton's inventions" Cashina Karen 2 Robot Krabs “ Spoiler alert! Warning! This page contains spoilers of an episode that has recently aired in the... Electric Eye SpongeBot SteelPants PatBot Robot SpongeBob Fuel rods Plankton Robot Chum Bucket bucket helmet Karen the Crystal Ball Robo-Squidward Duplicatotron 3000 Plankton's robot Robo-Plankton Sleepy-Time Back 1 2 3 4 5 Next Categories: Inventions Technology