Unlike a regular television crossover
, the Crossover Punchline is a brief gag. The Crossover is not vital to the storyline, it's just there for the fun of it. Used for laughs, it generally also uses the tropes All Just a Dream
or Alternate Universe
- Project A-Ko featured a blink-and-you'll-miss-it gag at the end of the original OAV, where A-Ko's mother is seen sewing something that looked suspiciously like Superman's costume. The gag (that A-Ko is Superman and Wonder Woman's daughter) is made far more explicit in the Antarctic Press adaptation, where her parents refer to each other as "Clark" and "Diana."
- At one point in The Big O, Roger Smith (who's a noted Batman Expy) is approached by a pair of reporters that look exactly like Lois Lane and Jimmy Olsen.
- There's a one shot manga by Osamu Tezuka about a company testing a robot Salary Man, who proceeds to go native and become a union leader, while at the same time seducing every woman on the staff. After his creators have him assassinated it's revealed all the women in the company have (somehow) had his babies, which confuses the hell out of his best friend, who wonders "What does a robot baby look like, anyways?" Cut to a delivery room full of baby Astro Boys.
- One episode of Cowboy Bebop ends with Spike ejecting a fridge with some kind of...thing inside. In episode 8 of Space Dandy, Meow finds the fridge and eats the whatever-it-is.
- Sayonara, Zetsubou-Sensei's "Seven-year punchline", which started back in Katteni Kaizo when a character is sealed behind a wall and doesn't appear again until Zetsubou, when she busts out and introduces herself.
- An issue of the Darkwing Duck comic had Launchpad lament the lack of openings for pilot/sidekicks. We then cut to him insisting he can fly the Rescue Rangers' plane. While holding it in his hand.
Gadget: No. No, you cannot.
- Didn't happen at the end, but the entire point for a Star Trek: The Original Series/X-Men crossover seemed to revolve around Nurse Chapel asking for Dr. McCoy, to which both Bones and Beast turn and say "Yes?", then react with mutual surprise.
- One Marvel comic book featured DC's Death of the Endless at a party, saying she should leave before "that creep Thanos" shows up.
- During Walt Simonson's classic Thor run, when Thor was in his civilian identity he stumbled into two familiar-looking reporters named Clark and Lois. The joke here is that Thor has just lost his ability to transform into his mortal form Don Blake, and has just asked Nick Fury to give him a new civilian identity. Concerned that he could not hide those muscles, Fury gave him a pair of glasses, since "they always worked for that other guy!" As Thor goes out wondering if they would work, cue the abovementioned meeting. And as he leaves the pair, a curious Clark looks back at him and wonders....
Clark: "Gee, that looked like... I could have sworn... naaaah."
- Similarly, when Voodoo and Spartan of the Wild CATs were vacationing, they were noticed by familiar-looking honeymooners named Scott and Jean. Helping the gag is the fact that Jim Lee drew X-Men for years.
- An issue of Superman ended with Mr. Mxyzptlk transporting himself to another dimension. He looks about himself, realises where he is and transforms himself into the form he normally wears in this universe; which looks suspiciously like Fantastic Four foe the Impossible Man. To clinch the gag, four very familiar sets of legs are seen walking away from him.
- Despite already being a crossover, Double Rainboom has one of these: At the end of the video, where Rainbow Dash is writing her letter to Princess Celestia about why you should not take things that don't belong to you, Pinkie Pie asks "What will I do with this then?", pulling out Bloo from hammerspace. The Foster's theme tune then plays as the video fades to the ending credits.
- This Ed, Edd n Eddy fancomic features a surprise appearance of Denzel Crocker in the last panel, giving an F like he always does.
- Considering the loops allow for cross-overs with almost everything, this is a favorite tactic by a lot of The Infinite Loops writers, though there are some who make a conscious effort to not over abuse this.
- At the very end of the 1944 Bob Hope film The Princess and the Pirate Bob thinks he's won the girl, only for her to rush past him and into the arms of his Road Picture co-star Bing Crosby, who had not been in the picture heretofore.
- At the end of My Favorite Brunette, Bob Hope's character is given a last-minute reprieve from execution; Crosby plays the very disappointed prison guard who was going to throw the switch on the electric chair.
- Wayne's World. "Have you seen this boy?"
- In The Stinger for Guardians of the Galaxy, we are given a look of The Collector's ruined museum, with Cosmo the Dog licking the Collector's hand. Suddenly, a voice says, "Dude, why do you let it lick you like that? Gross!" It's Howard the Duck.
- While he is a Marvel character, most people remember him from George Lucas' flop of a movie.
- The epilogue of the series finale of Newhart had Bob Newhart waking up in bed on the set of The Bob Newhart Show, next to his wife of the latter series, Suzanne Pleshette, explaining about his nightmare of being an innkeeper.
- The final show of Noels House Party ended with Noel waking up on the set of his earlier show Swap Shop.
- An episode of Caroline In The City ends with Niles and Daphne of Frasier arguing over whether or not the most recent strip is funny.
- The Seinfeld episode "The Keys" ends with Kramer appearing on Murphy Brown.
- After the credits of one episode of Mr. Show, a comic is seen talking to Dr. Katz. Especially weird just because Mr Show is live-action.
- One Halloween episode of Boy Meets World had a witch who wanted to sacrifice the guys in an occult ritual. At the end of the episode, they discuss the incident with another girl: Sabrina the Teenage Witch.
- A Halloween episode of Two Guys, a Girl and a Pizza Place revealed the killer that had been going around offing the cast to be... Mimi from The Drew Carey Show, who said she wanted her own time slot.
- An episode of The Lucy Show had Lucy mistakenly drafted into the marines, driving her drill sergeant insane. When she finally is able to leave, the sergeant is relieved he'll never have to deal with someone as nutty as her ever again. Enter her replacement...Gomer Pyle.
- In an episode of Family Matters, Richie has a friend over that says Carl "does look like the Dad from Fresh Prince!" During the credits, an outtake of this scene was shown. When Richie's friend says line this time, James Avery enters to everyone's amusement (both series were produced by Warner Bros.).
- In the final episode of Coach, Hayden and Christine find that Larry, Darryl, and Darryl from Newhart have been watching their cabin after they left for Orlando (not actually living inside the cabin, just watching it while they slept under it). This also doubles as an in-joke, because both shows were created by the same person (Barry Kemp).
- In an episode of Chuck, Big Mike turns out to be a cousin of Sgt. Al Powell.
- Dragon comic strips:
- Annual #5 had all the artists on the regular comics switch places: Dork Tower by Phil Foglio ended with the reveal that Bill was actually a disguised Dixie of What's New? with Phil and Dixie, while Nodwick by John Kovalic ended with the reveal that it was a Deep-Immersion Gaming session by the cast of Dork Tower (with Igor as a decidedly OOC Nodwick). (What's New? by Aaron Williams was a more conventional Nodwick crossover.)
- A later issue had a Nodwick story called "Epic For A Day", in which a mysterious helmet makes Yeagar temporarily epic-level ... until a portal opens and Phil removes the helmet, takes his derby from beneath it, and gives Yeagar a Dope Slap.
- The October 31, 2010 strip for B.C. has The Fat Broad running a pumpkin pie stand. The Cute Chick asks her where she found enough pumpkins to make the pies. The Fat Broad says that she just found one really big pumpkin. Cut to Linus, Sally, and Charlie Brown in a pumpkin patch with Charlie Brown saying "I don't think he's coming, dude."
- One of Garfield's "I hate Mondays" gags was prompted by seeing Snoopy's reflection in the mirror.
- References to Family Circus characters are a Running Gag in Pearls Before Swine.
- 1997 was the year of the Great April Fools' Day Comics Switcheroonie, in which a number of comic strip writers and artists handled each other's strips as a massive practical joke. In several cases characters from different strips met, such as Garfield and Jon having their house painted and leaving to visit the Bumsteads.
- A The Wizard of Id strip features the Snowman character mauled by vicious snowmen. His reaction?
How did Calvin
get in here?
- In episode 8 of Inanimate Insanity II, once the contests reach Meeple headquarters they hear a voice (at the moment unknown to them) belonging to Steve Cobs. When they try to see who the voice belongs to, we see Gamey, the host of Object Overload (another popular object show), who points them towards Cobs.