When past Rigby is in the process of finishing the time machine he says, "Can't make a time machine without adding a little time..." rolling up his sleeve to reveal a wrist watch. The time on the watch displays "58008".
The film took 2 years to make. Development began in early 2013 and production began in 2014 to 2015.
This is the first CN original movie since "Ed, Edd n Eddy's Big Picture Show", which aired on November 8th, 2009.
This is JG Quintel's first film
Mordecai and Rigby's high school is West Anderson High School, an obvious reference to director Wes Anderson.