Robot Krabs is a highly sophisticated robot that has many different features. Inside, from where Plankton controls it, there are hundreds of levers and pulleys to make the robot do many things. The robot is red and constructed from metal, with a metal suit as stated by SpongeBob. It has big eyes and its face acts and looks like a microphone. The robot appears to wear the same clothing as Mr. Krabs, but made from metal.
The robot has a self-destruct device activated by a penny inserted through a coin slot on his belt buckle. He can also disguise himself as a bread toaster.
One of the giveaways that the robot is not Mr. Krabs is that it periodically emits an exhaust fume with an audible noise from an exhaust pipe at the rear whenever it lies.
Role in series
Plankton creates and controls the robot. It is accidentally destroyed by SpongeBob when he puts a penny into the Self-Destruct Coin Slot, causing the robot and the Chum Bucket itself to be destroyed.
Plankton uses Robot Krabs to steal Krabby Patties. However, this robot is designed more differently. It is rusty, has no shirt or pants design, has more crooked arms, uses wheels for legs, and the chest somewhat resembles Mechagodzilla's.