It could be Perry the Platypus, in a really unexpected turn. Maybe Perry has to keep some secrets from Phineas for his spy work, and one day those secrets are revealed in a way that makes Phin feel betrayed. This would definitely make him mad.
Maybe Phin gets mad because Ferb keeps taking over their projects without much consultation. Ferb is often very methodical and might start changing things in their grand plans, which makes Phin frustrated.
Given that it's not a widely known fanfic, it may be difficult to find. You could start by looking through various fanfic platforms, like Archive of Our Own or FanFiction.net,...
His stories usually feature complex characters. In 'The Death of Ivan Ilyich', Ivan is a multi - dimensional character with his own fears, regrets, and realizations as he nears death....
One of the well - known works could be 'I Love Lucy' episodes that had some elements with a science - fiction touch, like when they had wacky futuristic or...
A game like 'Divinity: Original Sin 2' has a deep and immersive coop story. You create your characters and embark on a journey in a fantasy world filled with magic,...
Moon Knight's story is complex. He is a superhero with dissociative identity disorder. Marc Spector, one of his identities, was a mercenary. After a near - death experience in Egypt,...
Tug McGraw had a successful baseball career. He was a great pitcher. He had many memorable moments on the baseball field and was well - respected among his peers. Tim...
One popular one is 'The Haunting of [Manion Name]'. It has a great build - up of suspense as the main character explores the old, dilapidated manion. Another is 'Manion...