SpongeTrons X, Y, and Z are three of SpongeTron's clones. They appear only in the episode, "SB-129." They are three of all 486 of the SpongeTron's clones.
The identical SpongeTrons all greatly resemble SpongeBob, with all of them wearing Krusty Krab hats and the same clothes as SpongeBob himself.
They are the only three clones that appear in the episode. Their behaviors are much like SpongeBob's, as they are clones of him. They are also best friends with Patron, and they love jellyfishing, as in the episode, they pull out some jellyfishing nets and excitedly yell, "JELLYFISHING!" That is their only line in the SpongeBob SquarePants series so far, and it is most likely that they won't appear again. It is also most likely that they are able to fly like SpongeTron, though they are not seen flying in the episode. They probably work at the Krusty Krab, and it's possible SpongeTron does, too, since he and the clones are descended from SpongeBob. It is most likely they are also SpongeTron's siblings too.
They all look the same, so it's unknown how SpongeTron was able to tell who is who.