Jeffo

Jeffo is a one-time character that appeared in Robot Jeffy. Jeffo was a robot replica of Jeffy, built and created by Cody's robot, Codo. Jeffo was built to go to detention for Jeffy since he didn't want to go. Shortly after being built Jeffo went crazy due to Bully Bill enabling his Kill Mode and killed him, and later tried to kill Mario, Bowser Junior and Cody. He was eventually destroyed by Codo's laser eyes.

Appearence
He appears to look exactly like Jeffy except he has glowing red metal eyes andHis eyes as well as those  are from the FUNKO Five Night's At Freddy's Nightmare Freddy plush.