Rowling sends up this trope with Dolores Umbridge in Order of the Phoenix, as she's described as having images of insipid kittens mewling on the walls of her office wherever she works and her voice is described as "high, girlish" and sounding like "poisoned honey," she wears a black hairbow, and in the movie she is seen putting loads of sugar (PINK SUGAR) in her tea (also pink). This is a subversion, because she's actually a sadistic, evil, and bigoted old hag.
Beatrix Bloxam, author of the "Toadstool Tales" book series that was banned by the Ministry of Magic because the stories caused nausea and vomiting. One would normally assume this meant the stories were scary, as exemplified in this fanfic. But in Dumbledore's notes within The Tales of Beedle the Bard, it's revealed that the child readers' negative reactions were instead due to Bloxam having re-written Beedle's and others' wizarding fairy tales so that they're sickeningly sweet. "Then the little golden pot danced with delight - hoppitty hoppitty hop! - on its tiny rosy toes! Wee Willykins had cured all the dollies of their poorly tum-tums, and the little pot was so happy that it - " *BARF*
Then there's the epilogue: "All was well" ... a bit too well for those sensitive to excessive cuteness.
Many people react in this way to the over-the-top, frequent love scenes, love phrases and love acts in the Twilight series.
The late Dorothy Parker, reviewing books under the name Constant Reader, made her feelings about the Winnie-the-Pooh book The House At Pooh Corner plain: "And it is that word 'hummy', my darlings, that marks the first place in The House at Pooh Corner at which Tonstant Weader fwowed up."
How Susan's charge Twylla in Hogfathertries to act to endear people to her, but Susan will have none of it.
Susan: Real children don't go hoppity-skip unless they are on drugs.
In the words of one reviewer from Entertainment Weekly - "Not to be callous, but I've had it! I'm sure Oogy and Pukka are great pooches, but their cloyingly cute books are enough to give you a case of canine diabetes."
Lewis Carroll's lesser known duology, the Sylvie and Bruno books. The overly-cutesy perfection of the title children is probably the main reason these books are not given the same love as Alice.
In the Christmas-themed More & More & More Tales To Give You Goosebumps, one of the short stories, A Holly Jolly Holiday, dealt with a young girl whose older sister bought a video of a vomit-inducing Christmas special. The video had the power to turn those who watch it for a prolonged amount of time into near-carbon copies of the main character, Susie Snowflake.
In-universe example from The Host. Souls kept television around after taking over the planet, but every single pre-invasion show (save, briefly, for The Brady Bunch) was booted off the air and replaced with the Souls' original programs. All of them fit this trope.
Juniper by Robert Kraus. A preschool book about a bunny named Juniper, who lives in an Easter egg. He befriends a doe named Jeanette, she decides never to go home, and they play happily ever after. And one gets the depressing impression that any elil that ate them would get sick from the cloyingness.
Beneath the Sugar Sky the children must travel to the world of Confection which is literally made out of various candies and cakes (originally is was bread, but the later bakers got bored of bread). The sweetness bleeds into the locals too, since many of them are also made of candy.