Gilbert is a one-time villain who appears in the episode Knockoffs. He was the clerk on the Electronics Hut store who got inspired by Robotboy and started selling clones of him. However, the clones he created were very unstable and exploded, shortly after superactivation. After they all exploded, Gilbert escaped and promised to make better clones in the future, and sell them to the world.
- His design is based on Napoleon Dynamite.
- Gilbert tends to say "gosh", like Napoleon Dynamite.
- This character resembles very much to the football referee from "Foot Brawl", however it is unknown if he's supposed to be the same character or maybe someone related.