ToyBob seems to have an uncanny likeness to the real SpongeBob; with the exception of the robots gray, metalic body. The robot also has glowing red eyes, square feet, unjointed elbows and knees, and nose capable of emitting flames. The robot is powered by a wind up key located on his back with the sentence, "IF FOUND PLEASE RETURN TO THE CHUM BUCKET" on it. ToyBob's voice is similar to SpongeBob's but with a more robotic reverb to it.
Super Strength: ToyBob's robotic body seems to grant him tremendous stregth; enough to rip Squidward's door off its hinge and seemlessly throw people.
Flamethrower: ToyBob's nose is capable of emiting flames hot enough to burn through the Krusty Krab sign post.
Size Alteration: ToyBob is able to miraculously increase it's size into a larger and stronger version of itself .
In the episode, Plankton ordered ToyBob to wreak havoc on Bikini Bottom after he found out that SpongeBob is immune to his Jerktonium-laced fruitcakes. ToyBob did things like slamming the door from Squidward's House on Squidward's head, attacking citizens, and pursuing Santa and transforming into a bigger version of itself to spread more destruction and chaos in the city.
Despite the fact that ToyBob looks almost nothing like SpongeBob himself, he managed to fool everyone he encountered, even tricking Santa Claus into thinking SpongeBob, and everyone else, except Plankton, (and maybe Squidward,) had become naughty. Eventually, ToyBob started to set its sights on eliminating Santa, but SpongeBob managed to defeat and blow up the robot by covering it in fruitcake from Plankton's Jerktonium.
Ironically, ToyBob is largely responsible for the failure of Plankton's plan. His attempt to destroy Santa Claus (and subsequent destruction at the hands of the real SpongeBob) revealed that SpongeBob was innocent of the supposed crimes that put him on the naughty list, and Plankton was revealed as his creator due to printing "If found, please return to the Chum Bucket" on ToyBob's wind-up key.