Phineas and Ferb is a beloved Disney Channel cartoon that, for many, is impossible to replace — yet the showrunners themselves attempted that with at least one of the fan-favorite characters. The adventures of the tech-savvy stepbrothers, creating one impossible invention after another while their teenage sister desperately tries to show their mother what they have done, are amazingly clever and engaging despite its straightforward premise and formulaic plot. Even more bizarre is the B plot of the series, which follows their pet platypus fighting an incompetent evil scientist.

https://screenrant.com/phineas-and-ferb-milo-murphys-law-perry-replacement-diogee-explainer/