Another OWCA is Evil Post
Imagine how heartbreaking it would be if some psycho member of OWCA's top brass decided that Perry the Platypus, as OWCA's top agent, wasn't doing enough to eradicate evil because he loves his family too much so they order him to come to OWCA headquarters immediately.
Perry has no choice but to obey, though he's very afraid that such an order would result in relocation and mindwiping his loved ones. He's always feared relocation above anything else, and he knows OWCA could essentially take his family away with just a single word.
When he arrives, armed OWCA officials escort him to the secret laboratory, and Perry tries to appear stoic though he's being treated like a criminal.
The OWCA Director appears. He tells Perry that he's done excellent work for the organization when Monogram actually gives him assignments that aren't stopping a moron from blowing himself up all the time or being distracted because a kid wanted to play dress up with him (Perry takes offense to this).
"Monogram was a fool for using you like his personal errand boy, nor did he appropriately reprimand you for wavering from the cause. From this day forward, you will be a new agent. You will be bigger, faster, stronger, and dedicated only to your mission to eliminate every source of evil from this world."
Perry starts to struggle, but he's quickly forced into restraints he can't escape from.
He sees someone holding up a syringe with a strange liquid inside-and it's plunged right into his back.
It's painful. He's making a lot of horrible sounds as his body stretches and contorts, but nobody comforts him here.
He's bigger, faster, stronger...but he fights to remember everyone even as his memories slip away. Battling the Normbots with Phineas and Ferb. Watching Candace choose an outfit for her date. Eating Linda's cooking. Sitting on Lawrence's lap while he solves a crossword puzzle. Fighting Doof one minute and calling a time out when a soap opera they both like comes on. Helping Vanessa with schoolwork. Playing video games with Stacy and playing catch with Norm.
And then...it's finally over. He sheds the last of his tears as the OWCA Director and his subordinates look on triumphantly.
Perry the Platypus is gone. Only a nameless soldier remains.
Also there's a happy ending like Steven Universe Future where the entire cast calms the rampaging Perry with the power of love and want him to be part of their family and to come home safely without ever having to hide who he is. OWCA is publicly exposed for animal cruelty and numerous workplace violations and is disbanded forever and Carl and Monty create a replacement to employ former OWCA agents where they enjoy fair wages and paid vacations and they provide families with support and self defense classes if they choose to host an agent.