Similar to the original pitch of Phineas and Ferb, the pilot of Mikey Murphy's Law (labeled "Mikey's Law") was a storyboard pitch of what would eventually become the first episode of Milo Murphy's Law, "Going the Extra Milo". It was leaked on April 26, 2024, alongside several other pilots from other Disney Television Animated shows.
The plot is relatively the same as that of "Going the Extra Milo" (barring a few lines that went unused, as well as Milo being named Mikey back then), but includes a couple of design changes. Most notably, Zack used to look completely different. Zack was initially of Caucasian ethnicity with a small, round nose, angular cheeks, and two wavy, angular plucks of hair from a widow's peak, as opposed to the spiky, slicked hairstyle he'd have in the actual series. Interestingly, this design appears to be later used for the final design of Kevin Grant-Gomez, one of the main characters for Dan Povenmire's later show, Hamster & Gretel. Bradley's design was also notably different, having a shorter, wider head, curly hair and big, half-round glasses, looking notably similar to Carl of Phineas and Ferb.
