We only see a bit of zombie Bowser but the fangs are kinda disturbing. Oh wait, that's a bit of skull too. Don't try to think to much about the rest of zombie Bowser, even the concept kinda fits this trope (zombie dragon turtle if you don't get it).
This comic seems harmless enough, and in fact includes an absolutely adorable baby Vaporeon ... until you get to the Alt Text, where although Flareon (Fire) + Glaceon (Ice) = Vaporeon (Water), Flareon (Fire) + Leafeon (Grass) = something that apparently didn't work out too well for the offspring there.
This trio comic pokes fun at Sonic's eyes, but the first and last ones can be a bit unsettling
In this comic, Yoshi eats an egg he created by swallowing a Shy Guy and the Shy Guy comes out unharmed but dizzy at the other end. Silly and lighthearted so far. And then the Alt Text. "It's even worse when he eats omelettes." YEEK.
In comic 463, Ness and his team are relaxing in the hot springs when Master Belch -a sentient pile of vomit- decides to take a bath with them. Their expressions talk volumes, really.
The Alt Text may be a good place: "Oh Kirby, what hilarious thing have you turned yourself into this time?". Yes. Hilarious, indeed. *shudders*
So, here's what happens: Kirby has become some sort of abomination, a demented blob with various parts of his friends (such as Meta Knight's mask, Mario's hat, Link's elf ear, Yoshi's egg, and so on) stuck onto him, looking all mutated. You can see the words "hday Met", presumably Kirby at Meta Knight's birthday party, where he decided to swallow them all. His line of reasoning?
Kirby: My friends were being mean... so I made sure they'd never leave me! Now they'll ALWAYS be a part of me...!
Afterwards, he proceeds to consume everything because he wants more friends. That's right. He goes on a rampage and destroys multiple worlds, and by the end, he's a massive, unrecognizable, faceless blob. No features, no eyes, just a terrifying abomination with the faces of everyone he has devoured showing up on his body, with countless citizens added to the mix. It isn't until Adeleine paints a picture of what Kirby actually is (the cute pink puffball everyone knows him to be) and makes Kirby swallow it, that the effects are reversed and everyone who was swallowed is now safe and sound, if a bit confused at what went down, and then Kirby is back to his old self. ...For now.
Finally, the creator put up a warning that these panels are not suitable for younger readers. That's how disturbing this Halloween special was. Yikes.