Jeffo

Jeffo is the main antagonist of "Robot Jeffy!". It is a robotic clone of Jeffy with laser eyes.

Biography
After Jeffy received a detention, Cody commanded his robotic clone, Codo, to built a robotic clone of Jeffy to replace him for his detention. Unaware of the deception, Mario then took the robotic clone, dubbed Jeffo, to fulfill Jeffy's detention. However, Jeffo's instant kill mode activated when Bully Bill started to bully it, and it went out of control. Jeffo then returned to the house, where it attempted to kill Mario with his laser eyes. After that, Cody ordered Codo to stop Jeffo. Codo proceeded to confront Jeffo, and told it that he was his father. Upon saying this, Codo started shooting Jeffo with its laser eyes, destroying them both.

Trivia

 * Codo revealed that Jeffo was, in fact, its son, as it was its creator.