Doof Wins is a fanfic by The Regurgitator.
Dr. Doofenshmirtz creates a machine that combines all his previous inventions together to create one big "Inator" which leads to him finally taking over The Tri-State Area!
Meanwhile, Phineas, Ferb, Candace, and Isabella find out Perry's secret and must defeat Doofenshmirtz when Perry is incapacitated.
Phineas mentions making S'Winter (S'Winter )
Isabella's flashback seems to take place during the events of Unfair Science Fair Redux (Another Story)
Doofenshmirtz refers to Carl as Dr. Coconut and Carl is seen doing his Dr. Coconut Routine (Spa Day)
Candace mentions that Jeremy told him about her (The Lizard Whisperer)
Doof mentions dating Linda (What Do It Do)
Phineas mentions building the rollercoaster (Rollercoaster)
The following Inventions are seen/mentioned:
The Invisinator (Don't Even Blink)
The Freezeinator (It's About Time)
The Age Acelarator-Inator (Lights, Candace, Action!)
The Slaveinator (Raging Bully)