I’m sorry but when season five finally premieres, it’s OVER. I will not eat, sleep, leave my room, go to class, or BREATHE until I finish every last DROP, SCRAP, SNIPPET, FRAGMENT, PARTICLE, PIECE, and MORCEL…of Phineas and Ferb. I won’t be able to talk about anything else for DAYS. nay, WEEKS. nay, MONTHS. IM GOING TO LOSE MY MIND. I WILL BE SO FERAL CONSUMING ALL THIS NEW CONTENT AND INFORMATION. I will go insane. I will RULE the WORLD.
After Perry retires, the first thing he does is tell the Flynn-Fletchers about his double life, same with Pinky. Ferb reveals that he's known since they were kids, or at least, he suspected.
Phineas and Isabella become a couple during their senior year, maybe even earlier.
On the very last day of summer before Phineas and Ferb go their separate ways, they build some big, extravagant thing in the backyard, Candace had long since given up busting the brothers, and doesn't bother calling their mother. Sh doesn't need to. Linda comes home and, for the first time, actually sees it. She's beyond shocked, and maybe a bit angry, but given the fact that both boys are moving off to college in a few hours, she can't exactly punish them. All Linda can do is enjoy the fun thing they created. (She's going to be having a long, long talk with them during Thanksgiving break though).
Phineas and Ferb don't just get full-ride scholarships to hundreds of different schools. Colleges actually offer to pay them to attend. During summer after graduation, several schools even start a bidding war, desperate to have the boys attend.
Phineas and Ferb don't really need to go to college, Phineas just goes to be with his girlfriend.
Monty and Vanessa end up together.
Ferb ends up with a fireside girl.
Even when Phineas and Ferb are middle-aged adults, delivery truck drivers ask them "Hey, aren't you a bit young to be ______?"
One day, Phineas comes home to find his children building something outlandish and asks them if they're too young to be building this. They respond with "Yes, yes we are." Every delivery guy present who knew Phineas from his childhood begins laughing hysterically for several minutes.
Love Händel preforms at all of their weddings.
Perry never marries. He enjoys the single life too much. A few dates here and there with some platypus chicks he meets from time to time, but nothing solid.
I headcanon the children from @ask-tiesthatbind blog.
Phineas and Ferb, Milo Murphy, and Gretel Grant-Gomez are all life-long friends.
So a long time ago I drew Isabella in fifties attire cuz I wanted her to be in “My Sweet Ride” so badly, and when I looked back on it recently…
…yeah. 😂 I had to redo her design, I just HAD to. And since I’m on a “Isabella, Buford, and Baljeet need to hang out more” kick, you get some 50s Buford and Baljeet style too.
(Also gonna tag @dooffirmations, cuz she totally inspired this actually bfbfnfnfn, I now accept the headcanon that Isabella, Buford, and Baljeet were hanging out the whole time during “My Sweet Ride”, cuz what else could they have been doing?)