These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Bizarro Episode: "Bat-Mite Presents: Batman's Strangest Cases!" It features Scooby-Doo dancing the polka... and that's one of the more sane moments.
Black Hole Sue: Batman himself is this. Despite supposedly being just a "normal" human, he constantly shows up heroes that are far more powerful than he is and routinely easily beats up villains that should be powerful enough to beat him in a single punch, while everybody constantly praises him as the "best hero EVER!" Even having an entire episode devoted to said more powerful heroes trying and failing miserably to take over for him for a while.
Given that the show is a mostly an action comedy in the Adam West vein the various Sue-tendencies attributed to Batman may be intentional.
Averted in Requiem For A Scarlet Speedster, where Batman proves to be a poor match for the Flash's rogues, and deconstructed in Powerless where Captain Atom points out that a number of super-villains could kill Batman quite easily if they just used their power sets properly.
Crazy Awesome: Red Hood, especially under torture; and of course the Joker himself.
The whole damn show.
Ace the Bathound's jetpack.
Joker's jetpack and how it's powered. And his choice of weapon to combat Batman's light saber. A RUBBER CHICKEN!
Critical Research Failure: In the crossover with Sherlock Holmes, Holmes is so arrogant that he puts his life in danger to prove his superiority, is quick to decide that the supernatural is involved in his case, berates Watson for disbelieving in ghosts and demons, and is openly mean to Watson. So, the exact opposite of Doyle's Holmes.
In The Mask of Matches Malone, Nefertiti is said to have been given a cloak by the goddess Bast. However, Nefertiti was one of the only Egyptian queens who DIDN'T worship the Egyptian Pantheon.
Batman being crushed with a giant hammer and his soul drifting to heaven replete with harp, angel wings, and scowl, corny; him being melted in a vat of acid to the bone, horrifying; everything afterwards is just plain funny.
The episode "The Battle Of The Superheroes" crosses it a good dozen times, since it's a homage to Superdickery. A notable highlight is Superman picking up Kandor in it's bottle than shaking it while cheerfully shouting "EAAAAARRRRTHQUAKE!!". They even worked in a close approximation to the Super Pope Hat!
Evil Is Sexy: Catwoman. Well, as Batman himself says, she's not exactly "evil" per se, like his other villains, but he does seem to like her more when she behaves meaner. Like this dialogue from "The Knights of Tomorrow!";
Bruce Wayne: I forgot how cute you are when you're threatening
Joker's Emperor costume, compared to its comic counterpart. It has a whoopee cushion in the crown.
Killer Moth has his comicbook costume (unfortunately) and was the first villain Batgirl fought, but still uses giant moths like his Teen Titans counterpart.
Foe Yay: Taken beyond subtext. Batman lets Catwoman escape, Catwoman gives Bats her number.
Heatwave, Weather Wizard and Captain Cold all have this for Barry Allen when the world thinks he's dead. They interrupt their own robbery to complain about how boring and unimaginative an opponent Batman is next to him, and how "Geezer Flash" and "Baby Flash" just aren't the same. They're quick to deny it when Batman accuses them of missing him, but their delighted reactions when he returns say otherwise.
Sorceror Felix Faust helps Batman undo Batwoman's spell that switched their bodies, all the while thinking that 'Batwoman' was the same woman she'd always been, oblivious to the fact that the original spell had done its job. When he's talking about how he'll miss her after the body-switch was successful and Batwoman's off to prison, Batman asks him if he realizes that it was him in Batwoman's body. He smirks and replies:
Jonah Hex and Lashina are positively dripping with Foe Yay throughout "Duel of the Double Crossers!" It even ends with the two of them riding off together.
Bordering on Ho Yay when Bats teams up with the Joker.
Joker when Bats brings him to the Batcave and he sees the mementos inside: "An entire wing for moi? I knew you cared!"
Bat-mite lampshades Batman's relationship with Joker in "Emperor Joker". Then it is deconstructed when we see how horrible it is to be on the receiving end of Joker's attacks; even Bat-mite realizes it since he's helpless and chased by his own "Mini-Joker".
Genius Bonus: In "Mayhem of the Music Meister," the titular villain at one point flees from Batman along five telephone wires arranged like a musical notation staff... and his quarter-note-shaped vehicle jumps from line to line to follow Neil Patrick Harris' singing.
In the cold open for "Night of the Batmen!" Vigilante's fingerings and strumming are accurate to the music he's producing.
Harsher in Hindsight: In "Dawn of the Dead Man!", Batman is trapped in a limbo between life and death, acting as a ghost. He sees the gateway to the afterlife, with his parents urging him to join them. This is a little unsettling given that the episode premiered two days after the release of Final Crisis #6, which ends with Batman's death. Or as revealed at the end of the last issue, what looked like it at first glance.
And this episode shows the start of Deadman's friendship with Batman. In Justice League, we saw such a relationship come to an end. Deadman was forced to possess Batman to save the heroes from Devil Ray, killing him, but when it's over Batman realises he did it by using a gun. Bats does not look happy about it.
In "The Knights of Tomorrow", Old Joker is given six months to live due to the chemicals he's used over the years. Now, take a look at Joker in Arkham City...
There's a short gag about Sportsmaster out with his family on a roadtrip. Come Young Justice, and his character is a prime example of an Abusive Parent.
The entire concept of the show, a celebration of the rich, varied history of the DCU, in light of the New 52 and its disposal of this same history.
At the end of Mitefall, the execs ultimately feel a Darker and Edgier show will do better and cancel Brave and the Bold. This did not turn out to be case in real life - the ratings for Beware the Batman ended up nowhere as good as Brave and the Bold's, leading to Cartoon Network to eventually abruptly pull it from the schedule, keep it off the air for months, and then burn off all the remaining episodes at once, before cancelling the show and deeming it a 'financial failure'.
The very first episode has Blue Beetle arguing that Batman would always beat Superman in a fight because "Batman always has kryptonite". The third season kicks off with Batman actually fighting Superman...and he doesn't have kryptonite. And gets flattened.
In "The Mask of Matches Malone!" an amnesic Batman, in his "Matches Malone" guise, wears the Cursed with Awesome Cloak of Nefertiti (which grants the wearer nine lives), and would often get killed and then brought Back from the Dead in many ways. It is not until he gets killed for the ninth and final time that he is able to take off the cloak upon being brought back by its magic power. Two episodes later, we get "Emperor Joker!", and guess how many times the Dark Knight gets killed and then brought back to life by the Joker in many ways in a Death Montage? That's right, nine freaking times! And just like in "The Mask of Matches Malone!", it is not until his ninth death and resurrection that Batman does something, this time using Reverse Psychology to beg the Joker not to take away his sanity. If you happened to watch both episodes in Australia, it works in context, but in the U.S.? Not so much, since you have to get the Season 3 DVD in order to get the "Matches Malone" episode, as it hasn't aired on TV due to the "Birds of Prey" innuendo song clip that got leaked onto the internet.
Green Arrow (voiced by James Arnold Taylor) calling out Batman flirting with Catwoman (voiced by Nika Futterman) in "Inside the Outsiders!", considering the Dating Catwoman-esque sexual tension between Obi-Wan and Asajj Ventress (voiced by James and Nika, respectively) in Star Wars: The Clone Wars.
In "Cry Freedom Fighters!" when referring to Uncle Sam, Plastic Man quips "Uncle Grandpa's got some moves."
Jumping the Shark: The final episode "Mitefall!" has Bat-Mite attempt to invoke this, because he's gotten tired of BATB's comedic formula and wants a Darker and EdgierBatman toon. He alters the series to hit all the classic JTS marks (including having Ted McGinley Other Darrin AQUAMAN), while Ambush Bug (voiced by the original shark-jumper himself, Henry Winkler) tries desperately to prevent him. Since this is the last episode, Bug and Batman ultimately fail to save the show, but at least they make sure it goes out with its dignity.
Ironically enough for the viewer, Bat-mite's changes almost makes the show So Bad, It's Good in how silly the show becomes, including the NEON TALKING SUPER STREET BAT LUGE!
Considering one of the posts that didn't make it into the second thread screencap had her identified as the daughter of the Anti-Spiral, as well as a brief reappearance to call on her brother to avenge her, it's probably not over.
She basically shows up as a constant annoyance every so often these days.
De-aged Batman's sad crayon drawings from "The Malicious Mister Mind!", which he sends to the Marvels because he can't find the words to describe how their fighting makes him feel. It's purposefully both adorable and sad.
The dog has a jetpack.
Batwoman getting unmasked. Treated totally seriously, despite her mask covering pretty much nothing but some hair◊.
Strawman Has a Point: in "Joker: The Vile and the Villainous!". While Joker and Weeper are obviously only trying to sabotage the Bat-Probe because it would make crime more difficult, the fact that the Bat-Probe operates by summoning the police whenever it detects malicious intent veers dangerously close to prosecution of thoughtcrime. Batman acting a lot jerkier than usual doesn't help. Then again, the entire episode was from Joker's point of view, so there's a reason for that.
Captain Atom might be a Smug Super in this show, but he does raise a good point: If Batman was caught against Giganta, Despero or Star Sapphire without any time to prepare, he would be mulched pretty casually.
They fixed her in the second episode she appears in.
Wangst: The Doom Patrol's reason for breaking up and its former members spiraling into depression. Essentially, they were unable to save a hostage from being killed by a villain. It wasn't remotely close to being their fault that she died and no one blamed them for it. While this is an awful thing to have happen, they clearly overreacted.
Oh, and Batwoman? If Riddler manages to unmask you, be sure to look directly at the crowd of people. That way they'll never see your face.
What Do You Mean, It's for Kids?: This show has some episodes whose content may be a bit too suggestive or violent for children, even though it's rated TV-Y7-FVnote "FV" for "fantasy violence". Both episodes, "Emperor Joker!" and "The Mask of Matches Malone!", come to mind, though the latter episode contains violence and suggestive innuendo and only aired in Australia for a reason; and keep in mind that the show's creators did their best in softening the blows and trying to make the former episode more kid-friendly than the original, explicit Supermancomic book that it adapted very loosely.
Iron Woobie: Batman in "Emperor Joker!" He is tackled by the Joker, and it goes From Bad to Worse when Bat-Mite accidentally gives the Joker his powers, turning him into a God Emperor who uses them to twist the world in his own way. From that time on, the Dark Knight is forced into a Death Montage as he gets killed and then brought back repeatedly, with poor powerless Bat-Mite being Forced to Watch the carnage. It is not until he is revived from the last Death Trap of the electric chair that he uses Reverse Psychology to beg the Joker not to take away his sanity. And through it all, he defends himself and his own mind from the Joker, telling him that they both need each other to survive. The Dark Knight truly needs a hug after all that.