Robby has a difficult time throughout season three, and he doesn't have a redemption story like the other characters do. The season starts off with Robby nowhere to be found, since he took off after the big karate fight that left Miguel in a coma. Johnny and Daniel team up to find him, eventually finding him at his mother's rehab facility after countless failed leads. Daniel calls the cops and corners Robby, leading to Robby spending most of the season in a juvenile detention center. There, he tries to spend most of his time laying low by reading and serving in the soup kitchen. He's disappointed by his dad, who fails to show up when he said he would. Robby continues to despise Miguel, feeling abandoned by both his dad and Sam for him.
Robby teams up with bullies in the juvenile detention center and goes straight to Kreese and Cobra Kai once he's out. His rage toward Johnny, Daniel, Miguel, his own mother, and Sam is evident, and it goes perfectly with Kreese's philosophy. By the end of the season, a fight occurs at Cobra Kai between Kreese, Johnny, and Robby that ends up with Johnny knocking Robby out. By the end, Robby has abandoned both Johnny and Daniel, and is 100 percent on team evil, aligned with Kreese and Cobra Kai.
