The creature in 'The Creature from the Never Ending Story' often represents the unknown and the fears that lurk in the fantastical world of the story. It can be a symbol of the challenges that the protagonist has to face, adding an element of danger and mystery to the narrative.
I'm not entirely sure about the exact appearance as it can vary in different interpretations. But generally, it might be a large, shadowy figure with glowing eyes, something that looks menacing and out of the ordinary.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.