Trivia: When Ralph and Venellope arrive in the internet they are bombarded with pop up ads. One of those ads features a picture of a woman with short brown hair. That woman is Aunt Cass from the Disney animated film, "Big Hero 6." In addition, Baymax from that movie makes a cameo appearance at, "Oh My Disney!"
Trivia: The Philosopher's Stone from the first Harry Potter film is visible inside Nicholas Flamel's locker.
Trivia: Originally, this sequel was going to include all three main characters from the first film. However, due to scheduling conflicts with actors Jack Black, Dylan Minette and Odeya Rush, none were available and the script was re-written to focus on new characters. Black was later able to eventually free up enough time to appear in an extended cameo role, with several short scenes in the film's second half.
Trivia: Dennis Quaid's twin children are seen as extras in the dinner scene. His daughter is the little girl who points at him as he falls out of his chair during his medical attack.
Trivia: The way Donna attempts to get the bus stopped is a direct nod to the 1994 movie Speed. The bus driver is even named Sam, the same as the driver in that film.
Trivia: Even though Morgan Freeman is top billed, he has only six minutes of screen time.
Trivia: The setting is a little different (9-year-old Izzy is left alone at school), but "Home Alone" fans should recognize some parallel scenes. For example, the parents say, "We did it again" (forget to pick up Izzy after school) and run frantically through the halls; severe winter weather interferes with reaching Izzy; Izzy raids the refrigerator and pigs out on junk food; Izzy considers riding a skateboard down the steps, etc. Of course, there are stupid thieves who break into the school.