Revealing mistake: After Robin starts to believe that the Teen Titans are in fact a joke, he gets sad and goes out a hole in the wall saying goodbye to them. He fires his grappling gun up and steps out of the wall. But his arm remains bent as he stands casually in the air to be taken upwards. There is no effect of gravity or any realistic body motion in those moment. As his weight should have had him dangle down with his arm stretched out above him and him swaying like a pendulum. Instead he appears as a stationary action figure in a single pose with his elbow bent as he's taken up.
Teen Titans Go! To the Movies (2018)
1 revealing mistake - chronological order
Directed by: Aaron Horvath, Peter Rida Michail
Starring: Nicolas Cage, Kristen Bell, Tara Strong, Will Arnett
Continuity mistake: At the premier of Batman's new movie, Batman Again, Robin steps on The Atom and squashes him next to the red carpet. A few shots later, Atom's squished remains disappear from where Robin and the Titans are talking and dancing.
Trivia: When Raven pulls the Time Travel Bikes out of a portal, the music that plays is the theme to Back to the Future.