* ActorAllusion: In ''WesternAnimation/BatmanBeyond'', Creator/WillFriedle played Terry [=McGinnis=], a high-school student who recently became a PowerArmor-wearing hero and had to learn the ropes from Batman. In this series, Friedle plays Jaime Reyes, a high-school student who recently--you get the idea.
** Also, in ''Series/BoyMeetsWorld'' and ''WesternAnimation/KimPossible'' Jason Marsden played Will Friedle's best friends: Jason and Felix, respectively. Here he plays Blue Beetle's best friend, Paco. Also reprising his role as the Normal Best Friend of a teenage superhero from WesternAnimation/StaticShock.
*** See IWantYouToMeetAnOldFriendOfMine.
** Creator/NeilPatrickHarris plays [[WebVideo/DoctorHorriblesSingAlongBlog a singing supervillain in love with a woman who is in love with a superhero]].
*** Another episode has cowboy superhero Vigilante as [[WebVideo/DoctorHorriblesSingAlongBlog a singing superhero who declares "a man's got to do what a man's got to do."]] Fans of ''WesternAnimation/JusticeLeague Unlimited'' might recall the character's appearances there: he was voiced by Creator/NathanFillion.
** Another episode has Creator/KevinConroy playing the Batman of Zur-En-Arrh, as well as Creator/ClancyBrown and Dana Delaney playing Zur-En-Arrh {{Exp|y}}ies of Lex Luthor and Lois Lane.
*** In a similar vein, "Chill in the Night" features the voices of CReator/KevinConroy and Creator/MarkHamill as ComicBook/ThePhantomStranger and ComicBook/TheSpectre, respectively. The Phantom Stranger is [[WesternAnimation/BatmanTheAnimatedSeries acting as Batman's conscience]], where as The Spectre [[ComicBook/TheJoker is acting as a corrupting force, trying to drive batman to kill]].
*** Also in "Chill in the Night", Creator/AdamWest plays Bruce Wayne's father Thomas, who even wore a bat costume for Halloween. Julie Newmar [[DatingCatwoman played his wife/Bruce's mother Martha]].
** John Wesley Shipp [[Series/TheFlash1990 is playing another Flash]], although here it's of the "Reverse" variety.
** [[Series/HappyDays Henry Winkler]] and Creator/TedMcGinley appear in the GrandFinale [[spoiler:about Bat-Mite trying to get the show to JumpTheShark]].
** Pete Reneday plays UsefulNotes/AbrahamLincoln, one of many times he has done so, such as in ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'', ''[[Ride/DisneyThemeParks Hall of Presidents]]'', and {{Animaniacs}}.
* ExecutiveMeddling: According to the WordOfGod, Batwoman had her civilian identity changed from Kathy Kane to Katrina Moldoff after DC Comics executives voiced concerns about how the negative portrayal on the show might impact sales of the current ''{{Batwoman}}'' comic book series, which stars the similarly-named "Kate Kane". She was also not referred to by her codename in the episode, except for a throwaway line about a "Bat-lady".
** Indeed, [[MeaningfulName her name could be read as "Kate, in the mold of"]].
* ExiledFromContinuity: Corporate mandates meant that the writers couldn't use Franchise/WonderWoman on the show, until the Cold Opening of "Scorn of the Star Sapphire!" (episode 57 out of 65) ([[ShoutOut she even brought her old theme song with her!]]). The full Trinity showed up in episode #60, "Triumvirate of Terror!" (which pits them against Lex Luthor, the Joker, and a very DCAU-ish Cheetah).
** Played with in "Mayhem of the Music Meister!" where a picture of Wonder Woman is seen in Music Meister's Death Trap room, only to have her face obscured by other concert stickers so that you could only see her hair and trademark tiara.
** She and fellow former exile Superman were seen from behind in the [[BatmanColdOpen Cold Open]] to "Sidekicks Assemble!". Superman got his first appearance in the episode "Battle of the Superheroes!".
* HeyItsThatVoice: [[HeyItsThatVoice/BatmanTheBraveAndTheBold So much so that it has its own page!]]
* IronyAsSheIsCast: Given a nod in the episode "The Mask of Matches Malone!", which features a scene where Catwoman jokingly suggests that Black Canary being gagged by the bad guys is a good thing because she supposedly has a terrible singing voice when in real life, Black Canary's voice actress, Music/GreyDeLisle, is a Grammy-winning professional singer. Subverted in practice -- as heard in both "Mayhem of the Music Meister" and this very episode, Canary's singing voice works just fine (no problems from abusing her vocal cords with that "canary cry" of hers, it seems) -- but then that's Catwoman for you.
* NamesTheSame: Shark of the Terrible Trio shares a name with Shark, an actual tiger shark mutated into a humanoid form who had a cameo in "Night of the Huntress!" And neither of them are to be confused with Tiger Shark, of course.
* NonSingingVoice: In "Mayhem of the Music Meister!", Batman's "singing" voice belongs to Jeff Bennett rather than Diedrich Bader. Also lampshaded by Batman:
--> '''Batman:''' I'm actually more of a baritone. I was only able to match you using this Bat autotuning device."
* OneOfUs: Oh so many examples of the fact that the staff is as big of nerds as us, in particular "Mitefall!".
* TheOtherDarrin: In Katana's debut appearance, her few lines were voiced by Vyvam Pham. While she was silent in the teaser for "Duel of the Double Crossers!", she was voiced by Kim Mai Guest in "Inside the Outsiders!"
** The weird thing is that her first appearance features a normal American accent, while she gets a Japanese one in her second.
* PlayingAgainstType: Diedrich Bader as Batman. That's right: a guy known for playing TheDitz is the lead. To a lesser extent Creator/WillFriedle as the Blue Beetle, who is known for playing characters similar to Bader's.
** However, Diedrich Bader also plays {{Badass}} [[WesternAnimation/TheGrimAdventuresOfBillyAndMandy Hoss Delgado]].
*** Also, [[Film/NapoleonDynamite Rex]], creator of Rex Kwan Do.
** And Will Friedle also plays WesternAnimation/{{Batman|Beyond}} [[LegacyCharacter after a fashion]]. Does anyone else noticing a pattern here?
* RealLifeRelative: Diedrich Bader's son Sebastian provided the voice of Damian Wayne's child/Robin III/[[ComicBook/BatmanTheDarkKnightReturns Carrie-Kelly-Lookalike]] in "Knights of Tomorrow!".
* RecursiveAdaptation: "Night of the Batmen!" is based on an issue of the series' own tie in comic. Let that sink in.
* ScrewedByTheNetwork: If giving the final season 13 episodes when the first two had 26 wasn't enough Cartoon Network also managed to anger the fans more by airing the season's episodes with weeks, sometimes a month, between new episodes and without much promotion.
** "The Masks of Matches Malone!" episode has not aired in the US, after much attention was given online to the innuendo in the Birds of Prey song. (However, it can be found as a bonus episode in the Season 3 DVD set.)
** What's more episodes are broadcast with no regularity whatsoever, there can be months between two consecutive new episodes.
* TalkingToHimself: Helps that with LoadsAndLoadsOfCharacters there's only a finite cast of Voice actors.
* WhatCouldHaveBeen: In "Game Over for Owlman," according to WordOfGod, it was considered including [[WesternAnimation/BatmanBeyond Terry McGinnis]] as one of the alternate Batmen. They relented, however, due to it being so early in the series' run - preferring to stand on their own before going so meta.
** A fairly minor example, but according to the cover to the comic's first issue Katana was slated to have a wildly different design -- one more evocative of mainstream DC Katana, but, like, mostly purple. And pigtails.
----