Margaret: Not that kind of Jeannie! He means a magic genie!
Dennis' quote after hearing Margaret's wish.
Dennis: 2 Margarets?! Yuck!
After Dennis and Ali rescue Margaret and Molly from a waterfall.
Margaret: That was scary!
Molly: That was fun!
Margaret: Oh, be quiet!
Molly: Oh! Be quiet!
"Ghost Blusters":
After his kite pulls him into the air, Joey lands in Molly's baby carriage, this exchange between him and Margaret:
Margaret: If you broke anything....
Joey: Nah, I'm okay.
Margaret: I was thinking about my doll! (takes Molly out of the carriage)
Dennis: Oh, brother!
When Dennis, Joey, Gina, Ruff, and Margaret go to a haunted house to get Joey's kite back, to which Margaret says "There's no such thing as a haunted house." and tries to calm Joey down, she hears a spooky noise and jumps into Dennis' arms, clinging to him out of fright, Dennis shrugs, thus dropping Margaret in the process.
The entirety of the play in "The Price of Stardom" where Dennis becomes the prop man. Also, this exchange:
Dennis: Break a leg, Mr. Wilson! Mr. Wilson: With you back there, I probably will!
"Wet n' Wild":
This exchange after Margaret shows off her haircut:
Dennis: Well they done it dumb.
Margaret: Did it dumb.
Dennis: You got that right!
(Dennis and Joey laugh)
In "Dennis' Yard Sale" where Mr. Wilson helps Dennis reclaim the items Dennis sold:
Deep-Voiced Man: What do you want? Dennis: I need my lawnmower back, 'cause Mr. Wilson says so. (Mr. Wilson hides in a trash can)
The end of "Professor Myron Mentalapse".
"Dennis Race 2000":
Dennis deciding to build soap box racers while holding a box of washing detergent.
Margaret and Gina literally making their soap box racer out of soap boxes.
While crashing through a fruit market, Margaret and Gina each wearing some fruit as a hat.
"Strong Medicine":
After Gina and Margaret call Dennis a hero for scaring the bully away with Willy, Dennis shows Margaret that Willy is the true hero.
Margaret: Eek! (runs away) Waaaah!!! Dennis stuck a frog in my face!
Dennis: You know something? Those two would make a lovely couple.
(Dennis, Gina, Peebee, and the little kid laugh)
"Horsing Around":
Tommy aerobicizing Horace the Horse.
When Margaret comes along on Georgia, she asks Dennis what he called the "broken down old nag".
Dennis: We call him Margaret.
Margaret: (angry stare) Very funny!
"Dennis Predicts": This bit of dialogue when Dennis is talking to Margaret and Joey on the bus:
Dennis: So Dad says I have psycho powers.
Margaret: Not "psycho", "psychic", and I don't believe it!
"Mr. Dennistein": The department store mannequin that PeeBee and Dennis bring to life takes their "have anything you want for lunch" request too literally and he reaches for the refrigerator bulb.
"Sounds of the Night": A policeman tries to arrest Henry but Alice mistakes him for a prowler and attacks him with a broom.
"Lemon-Aid":
After Margaret ends her partnership with Dennis and starts her own lemonade stand to get back at him for the way he treated her, Joey comes over and Dennis offers him some lemonade, due to Joey's dyslexia, Dennis tries to cheat him by lying about the price.
Dennis: It says right up there! Can't you read?
Joey: Nope.
Dennis: In that case, it says 75c.
Margaret: It does not! It says 50c! Dennis Mitchell! How could you try to cheat your best friend?!
Dennis: Hey! Business is business.
"Queen of Chinatown":
Upon visiting the local Chinatown, Dennis talks about how far away China is, then Joey talks about the time they tried to dig there, only for Margaret to correct the latter.
Dennis: Wow! I though China was a lot farther away than this!
Joey: Yeah! Remember we tried to dig there once, but Mr. Wilson made us put back all the dirt?
Margaret: No, you clunk! This is "Chinatown", not China!
"Double Dennis":
Dennis and his cousin Prentice look exactly alike, and Dennis decides to swap his outfit with Prentice while the latter's parents go looking for a house, only for people to believe Prentice was Dennis with much better behavior.
At the end, after Prentice leaves, Margaret, still thinking Dennis said kind words to her, kisses Dennis to which he reacts in disgust and says nasty stuff to her.
"Barber Shop Disharmony" has this exchange between Dennis and the mayor:
Dennis: How come you don't cut your own hair? Mayor: Cut my own hair? Dennis: Sure, my dad says you're great at trimming the public.
"Dennis in Venice":
When Dennis and Gina sneak into the thieves' hideout and see that they made a fake Mona Lisa to sell the real Mona Lisa for an extremely high price, Dennis and Gina have this exchange:
Dennis: We've gotta stop them, Gina!
Gina: I know that, but how?
Dennis: Isn't it enough that I recognized the problem? Do I have to solve it too?
Gina: Yes.
Dennis: This is just like having Margaret along.
"Lights, Camera, Auction":
Dennis meets up with Mr. Wilson before he drives off to an auction.
Mr. Wilson: It's Mrs. Wilson's birthday and I thought I'd surprise her with something really cheap—I mean really pretty.
Followed by Dennis offering to come along to which Mr. Wilson objects. When Dennis plans on asking Mrs. Wilson what she wants that's cheap, Mr. Wilson puts him in the car without any hesitation. Dennis then gives a hilarious shrug and Aside Glance.
"Deserted with Dennis":
After Mr. Wilson lands on a deserted island and discovers Dennis in his suitcase, he says "I thought it was heaven, now I'm changing my mind!"
Then later on, Dennis accidentally drops coconuts from a tree. In a rarity for cartoons at the time, one of them hits Mr. Wilson's groin and he keels over.
Dennis and Ruff ride past a hedge trimmer, who trimmed one of the hedges into the shape of Dennis riding his bike with Ruff in the front.
After Dennis and Ruff land in Molly's baby carriage after Dennis brakes too hard on his bicycle, Margaret is about to kiss Dennis to make him all better, only for Ruff to get up and lick her.
Margaret: Yech! A dog kissed me!
"The Incredible Shrinking Dennis":
Hotdog, Dennis' cat, picks up a shrunken Dennis and prepares to eat him.
Dennis: One good thing: at least now I won't have to marry Margaret.
Margaret's reaction after Dennis says that.
Margaret: I heard that last remark, Dennis Mitchell!
"Crummy Mummy":
After Dennis opens King Putt Putt's sarcophagus to see what he was like, Margaret explaining he's a 5000-year-old mummy.
Dennis: How can a "he" be a mommy?
Margaret: Not "mommy"! "Mummy", dummy!
After King Putt Putt comes back to life, Margaret running for her life.
Margaret: (screams) Mommy!!!!!
Dennis: Not "mommy"! "Mummy", dummy!
Dennis accidentally triggering a huge pie fight in "Pie in the Eye".
"It's Magic Time":
Dennis pulling Willy out of his magic hat, only for Willy to jump on Joey, and then Margaret. Margaret's reaction afterward.
Dennis preparing to turn a carrot, which he really hates, into something he loves.
Margaret: (hopeful) You're going to turn it into me?
Dennis: (holds his nose and blows raspberry) No way! Hocus Pocus Dominocus!
"Menaced Marriage":
This bit of dialogue after Dennis mentioned Mr. Wilson runs out of nieces fast....
Margaret: And I'm going to be the flower girl.
Dennis: Too bad you can't give her away.
Margaret: Hmph! Very funny, Dennis!
As the pastor starts reading, Willy pops out of the bouquet Margaret is holding. After Margaret freaks out, this exchange occurs:
Dennis: Oh, boy! Margaret found Willy!
Alice: Face to face with that creature? What a horrifying experience!
Margaret: Dennis Mitchell! You humiliated me in front of all these people! (bawls loudly)
Henry: Now see what you've done! You've made her cry!
Dennis: But Margaret told me she always cries at weddings!
"Hospitality":
The staff of the hospital that Dennis is sent to for a tonsillectomy have horror stories of Dennis' past visits. Dr. Massey's involves a two-year-old Dennis having been sent to the emergency room to get a splinter removed. Dr. Massey is about to listen to Dennis' heartbeat with a stethoscope, only for Dennis to yell into the resonator and damage Dr. Massey's hearing. As the flashback ends, Dr. Bereford asks Dr. Massey if it was him it happened to, only for Dr. Massey to reveal that his hearing is still damaged.
When Joey, Margaret, Gina, and Peebee come to see Dennis in the hospital, Joey asks Dennis what he's going to name the baby, due to his aunt Julie bringing a baby home every time she goes to the hospital, Margaret says she'll be having the baby "when she and Dennis are married and Dennis has a high-paying job and earns enough money to build a magnificent castle in the suburbs", only for Dennis to remind her that they're only 6. Joey asks Dennis if the castle will have a moat...
In "It's a Guy Thing", after Dennis makes a sexist remark, Margaret and Gina set out to prove girls can go where boys can go and do the neat things boys can do; starting off by decorating Dennis' treehouse with pink curtains and painting the walls pink. Dennis and Joey later spot Margaret and Gina in the treehouse. This gave Dennis an idea; Dennis tells Margaret that she's the girl for him and wants her to kiss him, much to Margaret's delight. Unbeknownst to Margaret, Dennis takes out his frog Willy and makes Margaret kiss him instead. Margaret's reaction after realizing who she kissed.
Gina: Dennis! That wasn't very nice! How would you like to kiss a frog?
(Dennis does just that)
Film
Margaret tricking Joey into kissing her baby doll's butt. And Joey's expression afterwards.
"Don't call me stupid, baby rump kisser!"
As Dennis takes his bath, Mickey, his babysitter, reads him the story of Huffy the Little Mail Train. As he reads the story, he questions the logic of how a train could grow. He also mispronounces "sobbed" as "sobed", "sob-ed", and "sobobbed".
Dennis' ding-dong ditch on his babysitter and her boyfriend. The babysitter keeps accidentally bumping on her boyfriend's head.
Dennis trying to hold his laugh.
Mr. Wilson's Chiclet bucktooth.
Mr. Little and Mrs. Butterwell having trouble reading, because they are old like the other members of the garden club.
Mr. Wilson telling Dennis, in an eerily nice way, not to embarrass him in front of his party guests. He's clearly strangling the back of Dennis' neck and rubbed his hair too hard.
George:(in a sarcastically cheerful mood) Don't embarrass me!
This little dialogue:
Martha: George, take Dennis' suitcase up to the guest room, please. George: He's got arms. Martha: Don't start, dear.
Dennis asks George where he keeps the combination to his safe.
George: It's in my head. Dennis: What's that mean? George: It means I know it. I remember it. Dennis: What if you forget? George: I won't forget. It's a familiar number. I won't forget. Dennis: What's that mean? George:(getting irritated) It means it's a number I use all the time, so I won't forget!
It gets better when Dennis (who, by the way, is only five years old) immediately figures out what the combination is.
George discovering that his mouthwash has been replaced with pine floor cleaner. He spits it at the mirror and starts screaming which Martha hears from downstairs.
George then sprays his nasal spray in his nose. But its full of mouthwash instead, and he screams like his brain is on fire! Then he dunks his head in the water to get the mouthwash out by blowing his nose.
The scene where Dennis's Mom calls to tell Mrs. Wilson that her flight’s been delayed, resulting in Dennis having to stay for the garden party, and Mr. Wilson's reaction.
Martha: Don't worry about it. You get home when you can. We'll be just fine here. Alice: What's George gonna say? (Dramatic Thunder as we cut to) George: Over my dead body!
Pretty much the entirety of Dennis' time with Switchblade Sam.
Dennis: I can't shut my mouth because my nose is stuffy. Switchblade Sam:SHUT UP!! [Dennis is quiet]
The face Gunther briefly made right before he ran for home.
The face George makes while trying to spit out the aspirin Dennis shot into his mouth with a slingshot.
After Dennis discovers that Switchblade Sam stole Mr. Wilson's gold.
Sam: Say your prayers, little rat! Dennis: I can't; I didn't take my bath yet.
How about the scene that plays during the end credits? In that scene, Alice's co-worker gets her Just Desserts when Dennis activates the photocopier, nearly strangling her.
