The parody of the 1966 Batman TV series is hilarious, featuring some of Mort Drucker's best work. One panel in particular shows the Dynamic Duo entering the commissioner's office through the window, Batman riding on the back of his sidekick, who has a perfectly deadpan expression, as if this happens all the time.
After Superduperman reveals to Lois Pain that he is actually Clark Bent, she smacks him and walks away, admitting that she'll find Clark Bent creepy no matter what identity he assumes.
Right before this confession, Superduperman vanquished Captain Marbles by tricking him into punching himself in the face, which somehow causes him to explode.
The Love Story parody has several, especially when Jenny lies dying from "Old Movie Disease," which inexplicably turns her more beautiful by the second. In its final stages, it even straightens her teeth and bolsters her bust.
Book! Movie! is a parody of the tendency movies have to sanitize the content of whatever books they happen to be adapting. The link doesn't show it, but the ending of this story has the main character of the Book! version getting hauled off to jail for murder in as much seriousness a MAD article can muster, while the Movie! version still has the main character go to jail for murder, but does so complete with a 50's style overly saccharine song and dance number. Not to mention that the Book! version of the characters are mostly ugly(with one of them being naked) while the film versions of course all look ridiculously attractive.
Optimus Prime using posters of Dwayne Johnson and Ke$ha to come up with another excuse to take advantage of Zack: to find "The Rock" of "No-Talent-Tron."
The Reading Womb even works with twins!
Baby in womb: THERE'S A GUY IN HERE WHO LOOKS JUST LIKE ME
The Watcher: Episodes of MAD, mostly. Funny show! But sometimes, I catch something called, Adventure Time, which is where you and your friends are now.
Captain America: That's where we are? Hmm, what else do you see?
The Watcher: I see the crews of other cartoons sitting in a deli, complaining about MAD like a bunch of sissies!
Captain America: Ha! They'll be sorry, because MAD probably wins an Emmy in the future, right?
(pause)
The Watcher: You'd better get back to your friends.
Katy Putty's "Flammable" music video, particularly the ending where, after setting fire to a clay man, a paper-stock (think South Park) cutout woman, and a Captain Ersatz Muppet, Katy Putty is carted off by a police officer as she sings about listening to the fire marshal.
Pretty much the entirety of "Super80's", particularly the burn against Lady Gaga being a Madonna clone (and Weird Al Yankovic being mistaken for Russell Brand), the joke about VH-1's love affair with pointless nostalgia shows like I Love The '80s, Seth Green's line "If I can't have the '80s, no one can!", everyone freaking out after the boy mentions that the 1980s introduced Urkel and Alf, and Steven Spielberg admitting that he brought the 1980s to Earth so he can keep his career alive.
Denzel Washington manages to stop Thomas the Unstoppable Tank Engine mere seconds before he runs over Strawberry Shortcake's village. However, after hearing Strawberry Shortcake lives there, Denzel lets Thomas scoot a few more inches and destroy her town. The narrator closes the sketch by informing us that "nobody regretted any of their choices."
"ThunderLolcats" is one nonstop tribute to the memes of the internet with some ThunderCats goodness mixed in.
The fact that Will Friedle voices the Lion-O parody makes it much funnier.
Po using Pepe Le Pew as a shield against an Angry Bird.
For that matter, when (amongst other "every day" objects), he uses "some Pokemon", pulling out Zekrom and Reshiram (the mascots of Pokemon Black and White), to block the birds.
The Take That against Mr. Popper's Penguins, with Jim Carrey crying over his career taking a downward spiral.
Everyone gasping at the sight of pre-transformation Steve Rogers, until one of them reveals that it's actually Gollum. Then the real Steve Rogers comes in, and scares everyone just as strongly.
Steve:(hissing) My precious...(normal voice)...desires to join the Army!
Peggy calling Steve's USO Captain America costume the most ridiculous outfit she ever saw, only to find Lady Gaga as Captain America and Steve wearing a suit made of raw meat.
Red Skull commenting on the fact Captain America and Bucky seem unimpressed at his owning a mask that looks like a real human face.
Two and a Half Women: Starring Buffy Summers and Bella Swan.
Some of the product ads, like the Wolver-Clean, Hulked on Phonics ("We take credit card"!), Sponge-Wow, and the Bieber Bowl.
Poke-Harmony:
Hitmonchan: I always found myself dating losers. But Poke-Harmony set me up with a champ! A Machamp!
Machamp: OH YEAH! WHO WANTS TICKETS TO THE GUN SHOW?
Hitmonchan: I do!!
Bulbasaur: I was worried at first, seeing as he's evolved enough to be my father.
Venasaur: But we had so much in common, like being captured in Pokeballs, and being forced to fight for the amusement of humans. And that's not easy to find!
Mewtwo: AS A PSYCHIC POKEMON, I HAVE NO NEED FOR THE INTERNET! OR COMPANIONSHIP!OR WHISPERING!
"Dol-Phineas And Ferb Tale", particularly when the duo give the dolphin telekinesis.
Fluttershy: (coughs again to switch to a much deeper and intimidating voice) YOU'RE ALL ABOUT TO BE SENT TO FRANCE TO FIGHT ON THE BATTLEFIELD OF WORLD WAR ONE, which was called theGreat Warbecause we didn't know we'd HAVE more than one war. But now that we do, it just makes it less confusing to the movie going public. YOU GOT THAT?!
Pinkie Pie: ...what's a movie?
Pinkie Pie face-planting into the cake she baked, and finding the words "Yay friends!" have somehow been rearranged to spell "Go bronies!": "How is that even possible?"
And the fact that Pinkie Pie is trying to solve her problems with cake. Not only is it funny, but also totally in-character for her.
Also, the unicorns attacking. They managed to get Tara Strong to voice for their parody Twilight Sparkle!