Planktron

Planktron is a robot character from SpongeBob SquarePants (The Roblox Series) He is a metal black robot with canons on the shoulders and a clear dome first appearing in The Chum Secret.

Creation
'''Planktron was created as a guard of Plankton's Chum Factory. There was also no explanation behind the creation of Planktron.'''

Job
'''Planktron's job is to guard the chum factory while Plankton is cooking and managing. When SpongeBob and Mr. Krabs tried to run the Chum Bucket out of business, Planktron was called to throw them in a grinder from Plankton.'''

Appearances
The Chum Secret (debut)