Random Trivia For This Title:
- This was Mako's last film. He was announced as the voice of Splinter at San Diego Comic Con the day before he died. Fortunately, he had finished the majority of his acting. The film was dedicated to his memory.
- Splinter's appearance is generally consistent with the previous movies (in which he is depicted as having brown fur), although in this movie, he wears a proper karate gi, as opposed to dirty rags from the previous movies. His right ear is also no longer cut as it was in previous movies. Kevin Munroe jokingly responded that Splinter had an otoplasty.
- Towards the end of the film, several items are shown that reference the live action movies. These include: The Shredder's helmet and staff, a Foot Ninja Mask, the canister of ooze that mutated the turtles and Splinter (labeled TCRI instead of TGRI, though a crack is strategically placed to work either way), the Time Scepter, Walker's hat, Lord Norinaga's helmet, and pieces of the suits of armor worn by the Turtles in the third film.
- Specific dialog makes references to the previous live action movies. In the battle with the Foot Clan, Casey Jones says, "Two minutes for high sticking!" which was one of his lines from his introduction in the same film. The very last line of the film, spoken by Raphael is, "Man, I love being a turtle!" which has been spoken in each of the previous films.
- Jim Cummings is the only [Teenage Mutant Ninja Turtles] actor to make it into this movie since his first [TMNT] appearance in the 1987 version of the classic [TMNT] cartoon series, which he played Leatherhead, Genghis Frog, and the 1991 alternate of Shredder.
- During Raphael's finishing lines, the phrase "we strike hard and fade away into the night" was used. That was also the ending line in the first [TMNT] comic.
- The [Teenage Mutant Ninja Turtles] movie with the largest money budget ever made. The amount of it's budget surpasses the live-action trilogy's amounts. And it was the #1 film in the U.S. on its opening weekend, bringing in $25.45 million.
- The first entirely animated [Ninja Turtle] movie. The previous films in the series were all live-action. It is the first film in the franchise in 14 years. Chronologically, the film takes place after the original films.
- All the Generals' names are loosely translated from Spanish: Aguila (means "Eagle"), Gato (means "Cat"), Serpiente (means "Serpent") and Mono (means "Monkey"). And some of the 13 monsters are based on actual 'monsters' from popular myth - the first one that appears in the unfinished building is based on the Yeti, the next one to be captured is obviously the Cyclops, the one that eats a pigeon on a building is clearly modeled on gargoyles, and the one in the diner brings to mind the Jersey Devil.
- While Leonardo, Raphael and Donatello all have brown eyes Michelangelo has blue eyes. According to the film's director this was done to make Michelangelo seem a bit more innocent and younger than the other turtles.