Acclaimed Flop: The movie bombed in the box office (To the point where Disney would not release a movie based off an animated show until who knows when), but received critical acclaim.
Box Office Bomb: Unfortunately, the movie ended up as this. Despite extremely positive reviews, Disney hardly promoted the film outside of Disney Channel and Toon Disney, which ended up causing low ticket sales. DVD sales didn't help, since once again, Disney failed to promote it.
Dueling Shows: Almost. A KaBlam! short, Stewy the Dog Boy was planned to become a spin-off (Which was about a dog wanting to go to school, so he disguises himself as a human), but when Nickelodeon found out about the show, the spin-off was cancelled. Funny enough, Gary Baseman, the creator, did a short for KaBlam!, The Louie and Louie Show during it's first season.
The Other Darrin: Spot/Scott Leadready II was voiced by Nathan Lane for most of the series (though according to IMDb, he only did 11 episodes), but for the last few episodes in 2002, Kevin Schon was the one to voice the character. However, Nathan DID come back Spot/Scott when it came to The Movie.
Release Date Change: The movie was going to be released on September 5, 2003. For unknown reasons, it was moved to February 2004, and then got moved up to January 16, 2004.
Screwed by the Network: The show had great ratings and reviews, however Disney cancelled it in 2002 because of the One Saturday Morning block getting the boot for ABC Kids (only Recess, which was the most popular show on the block, survived the block switch, and it was in reruns). It doesn't help that during its' second season, ABC damned it to a 7:00 AM timeslot, when (Most of the time) the target audience would still be asleep.
It did get a theatrical movie, though. Which unfortunatly bombed in the box office due to poor promotion on Disney's part.