Even Cobra Kai: wasn't immune to this. In the third-season episode "Aftermath," Granola Girl Moon pulled out her guitar and led the students in a peace rally ("We don't have to punch/Let's go get some brunch and be friendssssss").
At one point, the cast of The Funday Pawpet Show got annoyed with a handful of channel dwellers who kept complaining that the show was getting too raunchy. In response they split one episode into two parts - First half was The Squeaky Clean Pawpet & Friends Show which fit this trope, followed immediately by The Poink Show which allowed the naughty weasel to crank the raunch Up to Eleven.
Used for laughs in Happy Tree Friends. Their misadventures often begin with them playing, doing something innocuous or disgustingly cute typical of animated animals. Of course, itendsbadly.
Parodied in the 'Lost Notebook' episode of Stickman Exodus, as the notebook is 'borrowed' by its owner's younger sister to doodle in. Thus surrounding the PTSD-suffering stick figures with fluffy, cutesy-talking friendly flowers, bees, teddy bears, and unicorns who join everyone's hands for the We're All Friends! song. Naturally, once her brother takes it back, things go very, very wrong...
This PETA website. Admittedly, though, the concept of a fish with cat ears and a Fu Manchu beard is a mite disturbing. And then we have the "Sea Kitten Stories" bit...
Several Squiby user-created adoptable lines, including Foufs. Just looking at the holiday-edition Foufs will give you a toothache.
The Touhou flashes made by takenoko exemplify this spectacularly, especially this one. Warning: you may die fromCuteness Overload.
"Pictures that invoke so much adoration that they cause near physical harm to occur. This is far above the level of just cute. Pictures that are HHHNNNGGGGG worthy."
There's also a "so moe i'm gonna die!" tag, used for images of characters taking physical damage (often in the form of nosebleeds) from cuteness overexposure.
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The Snuggle Bunny. So painfully cute it's almost an insult to actual rabbits.
SugardanSen tastes just as the title suggests. A 3 minute Moe explosion of visually amazing, kawaiibeetus-inducing catchiness that will have you dancing along if you're not HNNNNNNNNG-ing away from the combined barrage of epic/adorable.
100 Ways To Love A Cat. Deliberately evokes this trope to create a horrific endurance video of epic proportions - at thirty-five minutes, someone put way too much effort into this. Look out for the key change at twenty minutes in.
The Nyan Cat, and the little online game someone made to go with it. You have Nyans instead of points and go around getting sweets for MORE Nyans. Veggies are a no-no.
This name generator creates names intended to provoke this kind of reaction.
I Love Egg!!/ Get ready for an overload of egg cuteness.
Team Wondercute of the Whateley Universe. As if schoolgirls like Jade and Misty and Molly and Bunny aren't cutesy enough individually, they team up with some other students who like this stuff, and wreak havoc accordingly.
If the love between the two boys in In a Heartbeat isn't enough to have you puking rainbows, then the (Living, adorable) heart sure is.
The titular team from RWBY comes off as this to Emerald for their Wide-Eyed Idealism and Power of Friendship. However, it's subverted since none of the girls are quite as innocent and idealistic as they appear, and only get more jaded from there on out.