For the 2019 version, see here.
- Acting for Two: In the Japanese dub:
- Lynn voices both Poison Ivy and Lena Luthor.
- Wataru Takagi voices both Cyborg and Green Lantern.
- Tara Strong voices both Harley Quinn and Poison Ivy. Older fans might see this as a weird coincidence not only for the fact that they're both normally Batman villainesses, but...well. She also voices Raven.
- Grey DeLisle voices Wonder Woman, Giganta, Silver St. Cloud, Platinum, and Damian Wayne. The Lego Brain Drain movie has her also voicing Lois Lane.
- Jessica DiCicco voices both Star Sapphire and Lashina.
- Josh Keaton voices Green Lantern, Flash, and Steve Trevor.
- Tom Kenny voices Commissioner Gordon, Crazy Quilt, Lobo, and Sinestro.
- Hynden Walch voices Starfire and Blackfire.
- Kevin Michael Richardson voices Trigon, Mrs. Clayface, and King Sharkhead.
- Lauren Tom voices the Double Dare twins.
- April Stewart voices Granny Goodness, Stompa, and Miss Moone.
- Phil LaMarr voices Lucius Fox, Killer Moth, and Doc Magnus.
- Fred Tatasciore voices Solomon Grundy, Killer Croc, Brainiac,the Kryptomites, and Ares.
- Cristina Pucelli voices Miss Martian, Amethyst, and Catwoman.
- John DiMaggio voices Gorilla Grodd, Coach Wildcat, and Ambassador Drek.
- Misty Lee voices Big Barda and Mad Harriet.
- Mae Whitman voices Batgirl and Speed Queen.
- Teala Dunn voices Bumblebee and Artemiz.
- Actor Allusion: In Lady Shiva's Hero Of The Month episode, she and Flash have a ship tease moment. They're respectively voiced by Tania Gunadi and Josh Keaton, which isn't the only time they voiced characters who were ship teased.
- Adored by the Network:
- Let's just say the strong merchandise sales and the fact it's on YouTube helped increase the show's longevity.
- Advertisements for the toyline have been repeatedly shown on Disney Channel even though Disney owns Marvel, DC's rival.
- All-Star Cast:
- The show is composed of voice acting veterans like Tara Strong, Grey DeLisle Griffin, Stephanie Sheh, Mae Whitman, and so forth, and newcomers like Teala Dunn and Anais Fairweather.
- The Japanese dub is not a slouch on this either: So far we have Marina Inoue as Wonder Woman, Chie Nakamura as Bat-Girl, Yuka Terasaki as Supergirl, Chiwa Saitō as Harley Quinn, Lynn as both Poison Ivy and Lena Luthor, Rie Kugimiya as Hawkgirl, Megumi Toyoguchi as Catwoman, Fumiko Orikasa as Starfire, Wataru Takagi as both Cyborg and Green Lantern, Misato Fukuen as Raven, Toa Yukinari as Bumblebee,note Tsubasa Yonaga as Beast Boy, plus many others.
- Billing Displacement: Each episode, as well as the movies and specials, lists the actors in alphabetical order instead of order of importance. For example, in the movies, Yvette Nicole Brown (Amanda Waller) is almost always the first one credited due to how her last name starts with B, while Mae Whitman (Batgirl), is credited near the bottom since her last name starts with W.
- Crossdressing Voices:
- Kevin Michael Richardson voices Mrs. Clayface.
- Averted with Granny Goodness, who's voiced by an actual woman, April Stewart.
- Grey DeLisle voices Damian Wayne.
- Dawson Casting: Almost all the teenage characters in the show are voiced by adult actors. Teala Dunn as Bumblebee and Alexis G. Zall as Lois Lane avert this as they are closer in age to their characters, being only a few years older, although it's only a matter of time before they play it straight.
- Dueling Dubs: There are two Latin-American Spanish dubs: the Mattel dub, produced in Chile by DINT Doblajes Internacionales (with the theme song recorded in Mexico), and the Warner Bros. dub, produced in Venezuela by Etcetera Group (with Supergirl's lines recorded in Miami).
- Fake Nationality:
- The lead singer of the band Opposite Direction has a British accent, yet she's voiced by Tara Strong, who's American and Canadian.
- Rachael MacFarlane, an American, uses a Greek accent when voicing Artemiz.
- Tom Kenny, also an American, used a British accent when voicing Sinestro
- John DiMaggio uses a Roman accent for Ambassador Drek even though he's American.
- Dark Opal and Eclipso respectively have British and Eastern European accents, yet have American voice actors, Sean Schemmel and Mona Marshall, voicing them.
- God Does Not Own This World: Though Shea Fontana created the series, this show is a DC Comics/Warner Bros. project. This is best shown in the Lego projects, which she was not involved in, and have some differences from the main series. The junior novels, written by Lisa Yee, are supposed to tie in with Shea Fontana's work on the show and comics, but contradict them too much to fit into canon.
- Season 5 is the first season without her, playing this straight, at least in animation. Graphic novel wise, she's still involved.
- The ultimate fact that the entire franchise was rebooted without her involvement is a testament to this.
- Meaningful Release Date:
- The "Hero Of The Year" movie came out on DVD on August 23, 2016, while the episode "Dude, Where's My Invisible Jet" came out two days later. Both have Wonder Woman as a main character, which makes sense since Grey DeLisle Griffin, her voice actress, had her birthday on August 24.
- The episodes "Batgirl VS Supergirl" and "The Ares Up There" came out just after Batman v Superman: Dawn of Justice and Wonder Woman (2017), respectively.
- The Other Darrin:
- The Lego shorts and projects based on the series sees Ashlyn Selich replace Mae Whitman as Batgirl. This eventually carried over into season 5 of the main series. She's also replaced as Speed Queen.
- The Lego Brain Drain movie sees Grey DeLisle-Griffin replacing Alexis G. Zall as Lois Lane. This doubles as a role reprise.
- Also related to the Lego projects based on the series, Female Furies Lashina, Artemiz, and Mad Harriet are voiced by Meredith Salinger, Rachael MacFarlane, and Jennifer Hale respectively rather than Jessica DiCicco, Teala Dunn, and Misty Lee.
- The Lego projects sees Tom Kenny voicing the Kryptomites instead of Fred Tatasciore.
- Out of Order: Some episodes from seasons 2 and 3 air out of order. For example, Beast Boy's Hero Of The Month short is a season 2 episode airing during early season 3. At the very least, the episodes are numbered.
- The "Galactic Wonder" special appears to take place after the "Brain Drain" movie, but it was released a few months earlier.
- An interesting case is with "Fortress Of Solidarity". Despite it airing in and being branded for season 5, it's actually meant to be part of season 4 due to using the old animation, being written by Shea Fontana, and Mae Whitman voicing Batgirl instead of Ashlyn Selich.
- Playing Against Type:
- Subverted with Tara Strong as Harley and Ivy. Normally, this would be the case, but their Adaptational Heroism here makes them more in line with the character types she usually plays, such as Genki girls for the former and shrinking violets for the latter
- Played straight however with Mae Whitman and Misty Lee as Female Furies Speed Queen and Mad Harriet. They usually play heroic characters, like Batgirl and Big Barda in this series.
- Fred Tatasciore uses a higher register when voicing the Kryptomites. He usually voices deep voiced characters.
- While Sinestro's an Adaptational Nice Guy in "Intergalactic Games", going from a villain to just a strict headmaster, it's still unusual for Tom Kenny to voice him.
- At least until the Season 4 four-part "Ring Me Maybe" when it shown he's trying to rebuild Korugar Academy's student body (after the "Intergalactic Games" movie) by kidnapping Wonder Woman, Starfire, the Flash and Supergirl.
- Cristina Pucelli's usual character types are Genki Girls and shrinking violets. Miss Martian fits one of those tropes, but Catwoman and Amethyst don't. While the former has gone through Adaptational heroism, she's still a morally ambiguous rebel. The latter is a serious, no nonsense princess.
- Role Reprise:
- Grey DeLisle Griffin reprises the role of Wonder Woman from both JLA Adventures: Trapped In Time and the LEGO DC Comics Super Heroes DVD movies. She also reprises the role of Platinum from Justice League: Gods and Monsters. The Lego Brain Drain movie sees her voicing Lois Lane again, reprising the role from Justice League: Doom and other Lego projects.
- Tara Strong reprises her respective Batman: Arkham Series and LEGO Batman roles as Harley Quinn and Poison Ivy.
- Mae Whitman reprises her Batman: The Brave and the Bold as Batgirl for the first 4 seasons. Ashlyn Selich, who voices her starting in season 5, previously voiced her in this franchise's Lego projects.
- Tara Strong, Hynden Walch, Greg Cipes, Khary Payton, and Kevin Michael Richardson reprise their respective Teen Titans (2003) roles as Raven, Starfire and Blackfire, Beast Boy, Cyborg, and Trigon.
- Gorilla Grodd is voiced by John DiMaggio (reprising the role from Batman: The Brave and the Bold ).
- Josh Keaton reprises his roles as Green Lantern and The Flash from Green Lantern: The Animated Series and Justice League: Crisis on Two Earths respectively.
- The young Kari McCabe on Vixen is voiced by Kimberly Brooks, a role she reprises here due to the character's Age Lift to a teenager.
- Cree Summer and Masasa Moyo voice Thunder and Lightning, reprising the role from DC Nation.
- Fred Tatasciore reprises the roles of Solomon Grundy and Killer Croc from the Batman: Arkham Series and Son of Batman respectively.
- The Lego Supervillain High movie has Dr. Fate voiced by his Young Justice (2010) voice actor, Kevin Michael Richardson.
- Self-Adaptation: All of the graphic novel tie-ins were written by series creator Shea Fontana (with the exception of the bonus chapter for the final graphic novel Spaced Out that showed a sneak peek for the next continuity, which was written by Sholly Fisch).
- Short Run in Peru: A few episodes in late season 2 and 3 premiered on demand and on the Cartoon Network website before their debut on YouTube.
- Show Accuracy/Toy Accuracy: The 12 inch dolls' clothings, for the most part, are pretty accurate the to the character design present across the webisodes and other visual media. The bodily and facial proportions, however, are more exaggerated and give off a "super-deformed" vibe. Harley's doll has a conspiciously different hairstyle, too- while she has the pigtails, her hair is parted on the side and out of her face, while the design she represents has central-parted hair with messy bangs that frame her face.
- Word of God: On whether Mrs. Clayface was this universe's Lady Clay or a Canon Foreigner, Shea Fontana has stated it's both, but mostly the former
. - Write Who You Know: Shea Fontana finds that she really connects to both Wonder Woman and Ivy due to how she sees herself as a perfectionist like the former and more of an introvert.
