When Squidward arrives in the future, he shortly meets some SpongeTrons and Patrons in the kitchen area of the Krusty Krab, where the SpongeTrons work. There are 487 SpongeTrons, the official SpongeTron and one for each of the 486 letters of the alphabet. They are voiced by Tom Kenny.
His overall character is like SpongeBob's, only perfect square and robotic form.
Rocket flight - SpongeTron has small rocket boosters that he can replace with his feet.
Hat brick - SpongeTron has a brick in his hat that he can drop on people.
Laser hammer - SpongeTron has a hammer that can shoot a laser beam that he used to thaw out Squidward.
Clones - SpongeTron has many other clones he may use at his disposal.
Intelligence - Being in the future would mean SpongeTron has a vast intellect.
Cooking - Since SpongeBob, SpongeTron's ancestor, was an excellent fry cook, that probably means that all the other SpongeTrons have the ability to cook as well.
SpongeTron's best friend is Patron (a two-headed descendant of Patrick Star) and they all love jellyfishing, just like SpongeBob does.
He is first seen in the episode "SB-129" when Squidward arrives in the future. One of the SpongeTron's first words after seeing Squidward is "Holy Krabby Patties!," probably meaning that Krabby Patties are still in the future, but may look chrome. He makes a computer click sound to turn robotic.
SpongeTron's legs double as rockets, which allows him to hover over the floor. He can also pull their ties to make a robotic arm come out of their hats, holding a brick that they then will drop. The original SpongeTron has been known to boast a chrome hammer that emits a red laser beam. He uses this to free Squidward from a block of ice.