- Role Reprisal: Tara Strong previously played Batgirl in The New Batman Adventures, though she doesn't use the same voice in this series.
- What Could Have Been: Lauren Faust really did try to turn this into a full show and has shared designs for Batman, Robin, Wonder Woman and Harley Quinn. Apparently the reason Cartoon Network turned this down was it just wasn't what they were looking for and they already had a show with girls in it. Though ironically enough, they would later pick up the full version of DC Super Hero Girls. So... yeah.
- Word of God: Though never used in the series proper, Lauren Faust advises fans against mistaking Supergirl's bulk for fat unless they want her to pummel them.
Trivia / Super Best Friends Forever