The Other Darrin: In the first movie, Ted was voiced by Will Ferrell; in the sequels, he was voiced by Jeff Bennett. It also counts as a role reprise from the TV series.
Role Reprise: Frank Welker once again voices George in the three sequels. Likewise, Jeff Bennett reprises the role of Ted (The Man In The Yellow Hat) from the 2006 cartoon for the three sequels.
The original film
Breakaway Pop Hit: The film was fairly successful but it was eclipsed by its hit theme song "Upside Down" by Jack Johnson. It was a substantial radio hit. Indeed, his entire soundtrack album is arguably more popular than the movie it was written for.
Creator Killer: The film's mediocre box office intake led to Universal's in-house studio, Universal Animation Studios, undergoing a slow decline as Universal began outsourcing its productions to other animation studios, with their only in-house work being made since the film's release being two animated series based off Curious George (ironically) and The Land Before Time. Its demise was formally sealed when Universal purchased DreamWorks Animation and merged its television animation operations with Universal's. It's now an In Name Only unit for properties not under the DreamWorks or Illumination Entertainment banner.
Genre-Killer: Despite its decent success at the box office, the movie had the misfortune of conceding with the demise of traditional animation in the west and only further cemented its status in the 21st century.
Billing Displacement: To a degree. The opening sequence credits Frank Welker and Jeff Bennett last despite playing the protagonists. However, it's averted in the end credits, where, among the principle cast, the two actors are credited first.
Billing Displacement: Actually averted this time. Frank Welker and Jeff Bennett are rightfully given proper billing as the main characters.
Dawson Casting: Princess Isabel, a young girl, is voiced by 28 year old Daniella Bobadilla.
Playing Against Type: Production example. Rather than getting Susan Blu, who worked on both the 2006 series and the previous 2 sequels as the voice director, Wes Gleason, who's normally associated with DCanimation, is this movie's voice director.
Recycled Script: This movie is essentially an expanded version of 2 episodes from the cartoon, those being "New Hundley" and "King Doggy". note For the former, there's the plot of an excitable character accidentally switching places with a more no nonsense character. As for the latter, there's the plot of being mistaken for a royal figure.