Baljeet earned some kind of Doctorate and somehow managed to join up with the Resistance as their reliable brains. Eventually, he earned himself the nickname of "Dr. Baljeet", either at his request or due to popularity aimed at high intelligence.
When Phineas-1 and Ferb-1 arrive in the in the 2nd Dimension, Baljeet tells them about the laws of inter-dimensional traveling. The overall dimensions of the multiverse are allegedly grouped up in a circle, in which energy allowing for inter-dimensional traveling flows through said circle clockwise, thus resulting in an extremely long trip back to the 1st Dimension, as traveling between dimensions counterclockwise would require a massive amount of energy.
Baljeet manages to gather enough energy to open a portal to the 1st Dimension, but it is rendered so unstable that the slighest disturbance would cause it to close in on itself. As if on cue, Candace-1 steps through the portal, causing it to close and shutting her inside the 2nd Dimension.
He is among the Resistance members that congratulate the 1st Dimension citizens for their efforts in bringing down Doofenshmirtz. (Phineas and Ferb The Movie: Across the 2nd Dimension)
Two months following Doofenshmirtz's arrest, Baljeet is seen at the Flynn-Fletchers' backyards, where he suggests to his friends that they make up for whatever's left for the summer, as suggested by Phineas-1 and Ferb-1. He participates in the kids' new interest of sports, but this was interrupted when two giant ant robots and several Animal Borgs (sent by Doofenshmirtz's wife Charlene) attacked the Resistance.
While Candace manages to destroy one of the giant ant robots, Baljeet manages to take control of the other ant robot, allowing the Resistance to infiltrate into Charlene's penthouse to take the Doofenshmirtz family into custody. Baljeet also had implanted several deprogramming chips inside fedora hats to relieve the Animal-Borgs of their evil programming, Though the Resistance manages to free the Animal-Borgs (except for Pandaborg) of their evil programming, the Doofenshmirtz family escapes with Pandaborg on a hover-car driven by Vanessa's boyfriend Tony Marzulo. Despite the Doofenshmirtz family's escape, Baljeet continues on to live in peace with his friends. (Tales from the Resistance: Back to the 2nd Dimension)