Operation Doofaborg:Search and Destroy Doofaborg

Last time,in mission Contingency:Halt Doof's Invasion,Phineas launch a nuclear missile to halt Doofenshmirtz's invasion by disabling all Doof's robot and vehicles.

Plot
Doofenshmirtz has lost a lot of robots and vehicles.He build a giant robot called Doofaborg to seek for revenge and clear the way for an invasion.Phineas' squad assigned to destroy the Doofaborg.Candace deployed all available units such as tanks,fighter jets and helicopters.A hundred of those vehicles with the assist of the Tri-State Area citizens.The Doofaborg is the most powerful robot that can resist anything,even EMPs.

They found the Doofaborg located at the unpainted desert.They moving to the desert and shoots at the Doofaborg.They keep shooting but it is no use.At the base,Baljeet that isn't deployed into the battle,searching the robot's weakness.After a while,Baljeet found its weakness.Doofaborg can be destroyed by pushing a self-destruct button located inside the robot.Phineas,Ferb and Isabella moves into the Doofaborg while the others distracting it.

They're moving deeper into the robot and they found the self-destruct button.Before they pushed it,some small robots shoots at them.They just shoot the robots and destroys them.They pushed the button and running to an exit.The robot is going down.Phineas and Ferb jumped out.Right before Isabella could jump,Doofenshmirtz captured her.The robot crashed onto the ground.Doofenshmirtz got an impact-proof bubble,but Isabella didn't.So she trapped inside.

Phineas,Ferb and the rest moving into the crashed robot.Ferb,Buford and the rest finding Doofenshmirtz,while Phineas finding Isabella.He found her knocked out and trapped.Phineas moves a few debris that's trapping Isabella.Phineas carries her outside.Ferb,Buford and the others finds Doofenshmirtz remain intact.Ferb popped the bubble and restrain Doof.

A lot of helicopters arrived on the scene for exfiltration.Ferb and Buford brings Doofenshmirtz into a helicopter.Phineas carries Isabella to another helicopter.Those helicopters lift off and returned to base.Doof is held inside a prison.Isabella is in a field hospital where she is laying down on a bed.

After a day,Phineas visits Isabella in the field hospital.He asked her how is she.Isabella holds Phineas' hand and thank him for saving her.Later that day,Isabella is fully recovered and she's back as an elite operative.She's moving to the cell where Doof is in.But,Doofenshmirtz isn't there.Isabella reported the disappearance of Doofenshmirtz to Candace.This will make Doofenshmirtz to launch an invasion,again.....