Suggs first interaction with The Chipmunks is on a plane headed to Miami, and he makes clear he isn't a fan. After the plane is grounded due to Theodore releasing a monkey that released the other animals, Agent Suggs adds the boys to the No Fly List as revenge and as the result of them ruining his life. Not only did his girlfriend, Anna, dump him on Christmas for being an obsessive fan of The Chipmunks (he has Alvin and the Chipmunk merchandise all over his house and was playing "The Chipmunk Song (Christmas Don't Be Late)"), but he blames the brothers for ruining his perfect record of no incidences, effectively eliminating his shot of becoming an FBI agent.
Bent on revenge, Agent James Suggs follows the boys as they make their way to Miami. On his way, he takes advantage of his badge and title to try and do the same to the people he meets (one such incident involved him trying to use his title to get out of paying cab fare) though he's not always successful. His detective skills can't be denied though, as he's able to catch up to the boys on multiple occasions. He suffers much physical abuse during his journey including being thrown through a window, running into a sign, and being tattooed.
In their final encounter, Suggs is locked in an elevator so he decides to relax by the pool, certain he's lost his job as well. After refusing to leave simply because of his "status", stating the only way he's leaving is if they carry him out, two guards come in and do just that.
Both Tony Hale and David Cross (Ian Hawke) are well known for starring in the TV show Arrested Development.
In early development, James Suggs was originally named "Benson Freeman".
James Suggs is the only villain in the film series who never redeems himself.
He was the only antagonist to never meet Dave Seville or The Chipettes.
Simon also describes him as the Terminator from the 1984 film The Terminator.
After he passed out from the alcohol, when he was in a hotel room, the scene was similar to The Hangover Part II. Unlike Stu from The Hangover film series, instead of having one tattoo on his face, he had one tattoo on his chest that says "Sugg life" (which the parade manager said the tattoo was what he asked for) and on his back he had "Munks for Life" with the three chipmunks.
He presumably lost his job as an air marshal at the end of the movie for his actions.