Willy Wonka & the Chocolate Factory provides (in addition to many of the source novel's tropes) examples of:
Acid Trip Dimension: The boat tunnel could well be this! Neil Patrick Harris jokes in the Rifftrax commentary that "This is for all those 8-year-olds who dropped blotter acid before going to see the film."
Augustus in the book is disgustingly obese. In this film, he's not nearly as fat and his chubbiness is actually kind of cute.
Mr. Wonka in the book is an older man with a black goatee, and illustrators often portray him as hardly taller than the kids. In this film he's of normal height, clean-shaven, red-headed, and in his late thirties to early forties. (Also counts as Adaptation Dye-Job.)
Adapted Out: Charlie's father is stated to have died sometime before the story begins; the director explains in the making-of book Pure Imagination that the character was effectively superfluous.
Adaptation Expansion: The entire Slugworth subplot and the misadventure with the Fizzy Lifting Drinks. In the book, Charlie gets the factory as soon as the other kids were out of the running and doesn't have to pass a final test.
Oompas: Who do you blame when your kid is a... BRAT? Pampered and spoiled like a Siamese Cat? Blaming the kids is a lie and a shame. You know exactly who's to blame: The Mother and the Father!
Charlie's is temptation, Veruca's is greed, Augustus' is gluttony, Mike's is obsession, and Violet's is pride. All are tied by the common theme of self-indulgence. You know what else is a form of self indulgence? Chocolate.
Willy may, of course, be looking for someone who can balance a love of fun as well as making people happy with an inherently indulgent vice with a larger moral character. Balance and all that.
A.I. Is a Crapshoot: Inverted; in this case, the computer is the sane, rational one, while the humans are the ones going crazy. In a brief scene during the "worldwide obsession" segment, a scientist programs a computer to figure out where the last three golden tickets are. The computer refuses on the grounds that it would be cheating. The scientist tries to bribe the computer with the grand prize, but the computer rebuffs him, asking, "What would a a computer do with a lifetime supply of chocolate?"
All or Nothing: Although Charlie wins Mr. Wonka's contest by default (since the other children all "drop out"), Mr. Wonka disqualifies him on a technicality, delivering the news rather bluntly and cruelly. However, he subverts it a moment later by revealing that it is one last Secret Test Of Character, which Charlie passes. The other children in this film leave with nothing other than the Amusing Injuries they'd brought upon themselves. (This is different than the book. Then again, the book didn't have that contract.)
Mr. Wonka: But Charlie, don't forget what happened to the man who suddenly got everything he always wanted. Charlie: What happened? Wonka: He lived happily ever after.
Big Door: In the Chocolate Room — it's small on one side and big on the other.
Big Eater: Augustus Gloop and his family, to the point that his father eats a reporter's microphone in passing!
Bilingual Bonus: Mr. Wonka periodically addresses the tour group in other languages:
Madames et Monsieurs, maintenant nous allons faire grand petit voyage par bateau. Voulez-vous entrer le Wonkatania? (Ladies and gentlemen, now we are going for a great little boat trip. Would you like to enter the Wonkatania?)
Goodbye Mrs Gloop. Adieu. Auf Wiedersehen. Gesundheit. Farewell.
When Mr. Wonka is looking through his mail near the end, he says, "I really must answer that note from the Queen." Earlier, as the world sought out the Golden Tickets, the Queen of England shows up to an auction of the last case of Wonka Bars in the UK. She was likely not amused when she did not find a ticket...
Violet tells Veruca, "Can it, you nit!", and then says to her, "Stop squawking, you twit!". Finally Grandpa Joe says she won't listen to Mr. Wonka "Because she's a nitwit."
During the opening song, "The Candy Man", the store owner sings Wonka's skills are so good, "You can even eat the dishes!" After Mr. Wonka sings "Pure Imagination" he eats his tea cup.
In reference to the "Vermicious Knid" line above:
Grandpa Joe: Well, Mr. Salt finally got what he wanted. Charlie: What's that? Grandpa Joe: Veruca went first.
Burping Contest: A serious example — Charlie and Grandpa Joe effectively have one to bring themselves down from certain doom after ingesting Mr. Wonka's Fizzy Lifting Drinks.
Children Are Innocent: Averted. All the children have their faults. (See An Aesop above.) But Charlie's refusal to give in and sell the Gobstopper shows him to be still good at heart.
Comically Missing the Point: When Mrs. Gloop is horrified that Augustus, having been sucked up a pipeline, is probably turned into marshmallows as they speak, Wonka tells her that's absurd.
Wonka: Because that pipe doesn't go to the marshmallow room, it goes to the fudge room!
Covered in Gunge: The Wonkamobile, which runs on carbonated beverages, winds up covering its passengers in gallons upon gallons of foam. (Thank goodness for the Wonka Wash!)
Crowd Song: All four Oompa-Loompa numbers. "I've Got a Golden Ticket" was conceived as this, with the whole town celebrating along with Charlie and Grandpa Joe, but director Mel Stuart nixed it as too unrealistic.
Crunchtastic: "Scrumdidilyumptious", which is used in-story (the Scrumdidilyumptious Bar), served as part of the original Tagline ("It's Scrumdidilyumptious!"), and even got defictionalized as one of the real-life Wonka brand products that the movie launched.
Cut Song: An Edited for Syndication case — Mrs. Bucket's solo "Cheer Up, Charlie" is often cut from commercial TV airings at the director's request, as he felt it was not vital to the narrative.
Deadly Rotary Fan: Charlie and Grandpa Joe narrowly escape one during the Fizzy Lifting Drinks scene.
Some of the Oompa-Loompas' songs qualify, especially the one for Augustus.
Disproportionate Retribution: Pretty much. After ignoring Wonka's warnings, a glutton gets carried away for drinking too much chocolate, a gum-obsessed girl gets deformed by gum, a boy who can't stop watching TV gets shrunken by a TV, and a bratty girl and her ultra-indulgent father fall to their presumed doom while she's insisting on being given everything in sight. Of course, Mr. Wonka assures Charlie that they didn't die.
Disqualification-Induced Victory: After it's reported that the final Golden Ticket has been found, a depressed Charlie finds some dropped money and uses it to buy two Wonka Bars (one for himself, and then another for Grandpa Joe). As he heads outside with the second bar, the news is spreading that the final ticket was a fake. Charlie can't help but wonder if maybe...indeed, the real final ticket turns out to be in the bar he just bought!
Mr. Salt: Where did she go? Mr. Wonka: Where all the other bad eggs go. Down the garbage chute. Mr. Salt:(chuckles) I know she fell into the garbage chute. Where does it lead to? Mr. Wonka: The furnace. Mr. Salt:(laughs) The furnace? She'll be sizzled like a sausage. Mr. Wonka: No, not necessarily. She could be stuck just inside the tube. Mr. Salt:(still laughing) Inside the— (he starts suddenly in shock and runs) Hold on! Veruca! Sweetheart! Daddy's coming!
The Fair Folk: In the beginning, Charlie meets a superstitious old peddler who recites the very lines from the poem by William Allingham that are posted as the quote for this trope, clearly believing that the "mysterious workers" who work in the factory have something to do with the Fair Folk. (Of course, this is a subversion; the Oompa-Loompas are friendly, harmless creatures, and are not fairies.)
Follow Your Heart: "Pure Imagination" has the famous chorus "If you want to view paradise/Simply look around and view it/Anything you want to, do it/Want to change the world?/There's nothing to it..."
Food Porn: The opening, for those who love chocolate.
Foreshadowing: As Grandpa Joe tells the story of Mr. Wonka's factory, he notes that of his rivals, "Oh, Slugworth, he was the worst!" It turns out that Slugworth is still causing trouble as he tracks down the Golden Ticket finders.
Funny Background Event: Rather a foreground event. During the scene where the candy shop owner is singing, he lifts the counter top to allow the kids behind the counter. A girl gets hit on the chin by the counter.
"I am now telling the computer exactly what it can do with a lifetime supply of chocolate!"
"Candy is dandy, but liquor is quicker" is a quote from Dorothy Parker about how to get a woman into bed.
Violet, while describing the three-course meal gum: "It's thick and creamy and I can feel it running down my throat!" (She's talking about tomato soup.)
Mr. Salt and Mr. Wonka on the same gum: "Bull!" "No, roast beef, but I haven't got it quite right yet."
Mr. Wonka's Lickable Wallpaper: "The snozzberries taste like snozzberries!" Cracked discusses the place below the waist snozzberry is slang for.
Gluttony Montage: Comes during the instrumental break in "Pure Imagination", as everybody in the tour group enjoys the delights of the Chocolate Room.
Hand Wave: Any time a character (aside from Charlie) asks Mr. Wonka how or why something is, he brushes it off in the most fantastically snarky way possible:
Mr. Salt: Snozzwankers? Vermicious Knids? What kind of rubbish is that? Willy Wonka: I'm sorry, but all questions must be submitted in writing.
Hollywood Law: Mr. Wonka makes the children sign a contract before the factory tour. A minor cannot legally enter into a contract. In real life, their parents — or, in Charlie's case, Grandpa Joe — would have had to sign for them (which is how it works in the corresponding scene in the 2013 musical).
Homage: Many seemingly profound things that Mr. Wonka says in the movie are actually paraphrased from the works of classic writers. For instance, when he says "Is it my soul that calls upon my name?" he is referencing the line from Romeo and Juliet, Act II, Scene 2, where Romeo quotes, "It is my soul that calls upon my name." His statement, "The suspense is terrible. I hope it'll last," after Augustus falls in the river is almost a direct quote from Oscar Wilde's The Importance of Being Earnest. His statement "Across the desert lies the promised land" paraphrases The Bible itself most likely (probably Exodus). A full analysis of his quotes can be found here.
Hypocritical Humor: When Mr. Wonka says his Rainbow Drops let you spit in 7 different colors.
Violet:(while picking her nose) Spitting's a dirty habit.
Mr. Wonka: I know a worse one.
Humans Are Bastards: More humorous than usual, with the adults acting even more greedy and sociopathic than the kids during the "Wonkamania" over finding the Golden Tickets, including one woman who considers letting her husband die rather than giving up her case of Wonka bars as ransom.
Mrs. Gloop panics after her son goes in the river and up the pipe to the fudge room. It doesn't help he gets stuck along the way.
Mrs. Teavee swoons and faints theatrically (and hilariously) after her son gets shrunk.
Mrs. Curtis, whose husband is held for ransom and she's stuck trying to decide whether or not to give up her case of Wonka Bars to save his life.
"I Am" Song: Played with: "The Candy Man" celebrates a title character who hasn't been seen in years and who turns out to be more eccentric and tricky than the song implies. Mr. Wonka himself sings "Pure Imagination", which not only fits better, but has some of the best I Am Choreography one could want.
Mrs. Teavee is a schoolteacher. She hears Mr. Wonka play a tune and immediately says "Rachmaninoff" - but the tune is actually from Mozart's The Marriage of Figaro, which sounds nothing like Rachmaninoff. She also smugly notes that she teaches geography to back up her assertion that Loompaland doesn't exist, but Mr. Wonka just rolls past this with "Then you know all about it!"
Her son counts too, at least when it comes to television broadcasting.
Last Note Nightmare: The final note of the upbeat opening number "The Candy Man" is off-key. Tellingly, it's on that note that the audience first sees poor Charlie Bucket, who's apparently been on the outside of the shop looking in all along. Later, one of the many variations of "Pure Imagination" plays as the boat starts down the chocolate river, and when it enters the psychedelic tunnel, the music appropriately turns ominous.
List Song: "I Want It Now" is devoted to listing the many things Veruca wants.
Lying Finger Cross: When Mr. Wonka gives the kids Everlasting Gobstoppers and makes them promise not to tell another living soul about them, all the kids but Charlie cross their fingers behind their back.
Merchandise-Driven: The only reason this film was made was because Quaker Oats wanted to develop a new candy line, and agreed to put up the US$3 million the movie cost, in effect as an advertisement for the new candies mentioned in the film. If you see the film, you will note that the copyright owners are the Wolper Corporation and The Quaker Oats Company. (The candy flopped because of a botched recipe that left the bars literally melting on the shelves, meaning they had to be pulled. The Wonka brand was later revived by Nestle and still exists in a case of Defictionalization.)
Missing Mom: In contrast to all of the other children, Violet Beauregarde's mother is never shown, only her father. Her voice is heard offscreen; apparently, showing her face wasn't considered a high priority.
Mood Whiplash: Happy, cheery Wonka singing about "Pure Imagination", the reveal of the Oompa-Loompas...then Augustus starts drowning in the river!
The Musical: An all-out example compared to the structure of the book (and the 2005 film lampshades this).
Musical World Hypothesis: Alternate Universe (anyone can burst into song at the drop of a hat), whereas the book is Diegetic (the Oompa-Loompas simply like to make up songs).
Nightmare Fetishist: During the horrific boat ride, Mike Teavee is the only person besides Mr. Wonka who seems to be having a good time. "Boy, what a great series this would make!"
Noodle Incident: "Snozzwangers? Vermicious Knids? What kind of rubbish is that?"
Not Even Bothering with the Accent: Done quite deliberately. All of the cast not explicitly identified as being from a certain area just use their own accents. This is particularly obvious in the scenes set in Charlie's hometown, as not being able to pin down an overarching accent increases the feeling of Where The Hell Is Springfield?. For everyone else, it just emphasises the global nature of the ticket hunt (though the main accents are German, British and American).
Parental Bonus: It almost seems like the two halves of the film are meant for different audiences. Kids will love the colorful, creative chocolate factory of the second half, while adults will prefer the social satire of the first half.
Parental Love Song: "Cheer Up, Charlie" is sung by Mrs. Bucket to Charlie as he becomes depressed over not finding a Golden Ticket.
Please, I Will Do Anything!: Early on, there's a woman whose husband has been kidnapped. She says she'll do anything to get him back... and then the kidnappers demand her case of Wonka Bars. All of a sudden, she needs time to think it over.
Popping Buttons: Violet's belt pops off as she swells into a blueberry, and her dress is stretched out to its limits by the time the transformation is through.
The film adaptation addresses the problem that at the moment Charlie begins the factory tour, he becomes a completely passive non-entity who does nothing to earn the prize at the end outside of staying out of trouble. He still keeps his sense of wonder.
Dahl left the production because his original script made everyone unlikeable.
The switch from squirrels/nuts to geese/eggs was likely this; even if they sprang for the special effects required it would have almost certainly ended up looking pretty bad done with the technology of the time.
Putting a Hand Over His Mouth: When Mr. Wonka is explaining that the golden chocolate eggs are being prepared for Easter, Mike Teavee notes "But Easter's over!" Mr. Wonka proceeds to do this, saying in a low voice "They [the geese] don't know that. I'm trying to get ahead for next year."
Read The Fine Print: Part of the "You lose!" rant points out a clause concerning Fizzy Lifting Drinks. A very small clause. Also part of his Secret Test.
The Reveal: At the end, it turns out that that's not the real Slugworth, but an employee of Mr. Wonka's masquerading as him.
Rewritten Pop Version: Sammy Davis Jr's cover version of "The Candy Man" changes the phrase "Willy Wonka makes" to "The Candy Man makes".
Road Trip Across The Street: An extreme example. It's not just that the tour party travels down a modest corridor to the Wonkavision room via the Wonkamobile — a curious car-like contraption. It's also that, while supposedly powerful, it moves no faster than walking pace and leaves everyone Covered in Gunge until they pass through the "Wonka Wash"! Upon disembarking, Mike asks Mr. Wonka if they couldn't have just walked and his reply is "If the good Lord had intended us to walk, he wouldn't have invented roller skates."
Sdrawkcab Name: Mr. Wonka and his remaining guests ride the Wonkamobile, which covers everyone with foam; then they drive through a device which turns their clothes dry and spotless.
Mrs. Teevee: What was that?
Mr. Wonka: Hsaw aknow.
Mrs. Teevee: Is that Japanese?
Mr. Wonka: No, it's "Wonka Wash" spelled backwards.
Serious Business: The whole world goes a little mad searching for the Golden Tickets:
News Anchor: (After last golden ticket is found) "We must remember there are many more important things, many more important things . . . off hand, I can't think of what they are, but I'm sure there must be something."
Theme Tune Extended: When Michael Feinstein recorded a Cover Album of children's songs in The Nineties, he chose "Pure Imagination" to serve as the title track. Because the song is rather short as is (one verse and a chorus that gets two go-rounds), original lyricist Leslie Bricusse wrote a second verse and chorus to extend it. Interestingly, while there have been quite a few cover versions of this song since then, the vast majority of them do not use this extended version.
Truth in Television: Most of Mr. Wonka's factory is pure fantasy, but his statement that he's making the geese work even though Easter is over to stock up for next year is, in fact, standard procedure for any product that is only sold during a holiday season. A company has to manufacture it all year and store it, because the demand for it during the month or so when it's sold is overwhelming.
Too Many Halves: Willy says "Invention, my dear friends, is 93% perspiration, 6% electricity, 4% evaporation, and 2% butterscotch ripple." Mrs. Teevee points out that that adds up to 105%.
Villain Song: Veruca's "I Want It Now" song, which, ironically, ends badly for her right when she finishes it.
We All Live in America: It's actually hard to tell if this trope is inverted, subverted, or averted. The location of all the filming Charlie's hometown was Munich, Germany, the better to give it a timeless feel. The houses do have a distinctly German look to them as a result. But other than that, Charlie has an American accent in a place where everyone else has British accents.
What Does This Button Do?: Played by Mr. Wonka at the end in the Great Glass Wonkavator. Mr. Wonka lets Charlie know that he has pushed every button in the compartment besides one with a red ring around it, which he encourages Charlie to do, claiming he doesn't know what'll happen. Mr. Wonka eventually reveals he actually knew it would lead them up and out of the factory.