Naruto might be very curious about Star's magic wand and her unique powers. He would probably approach her with his usual friendly and enthusiastic attitude. He could show off some of his ninja moves to her, and in return, Star could show him some of her spells.
It's really hard to say who would win. Naruto has his powerful jutsu and the nine - tailed fox power. But the Justice League has a diverse set of superpowers. If Naruto can use his shadow clones effectively and his more powerful jutsu, he could have a chance. However, the Justice League has the combined strength of Superman, Batman's intellect, and the powers of other members. So it could go either way depending on how the story is written.
Well, in such a fanfiction, Naruto's ninja skills would be a huge threat to the Justice League. His shadow clone jutsu could potentially overwhelm them. The Justice League, on the other hand, has superpowers like Superman's strength and Batman's strategic mind. It could be a battle of brute force and strategy. Maybe Naruto would try to use his chakra to disrupt the League's powers. However, the League might find a way to counter Naruto's jutsu with their advanced technology and unique abilities.
One interesting crossover could be the characters from 'Star vs the Forces of Evil' ending up in the Naruto universe. Star could use her magic in new and unexpected ways in the world of ninjas. Maybe she'd team up with Naruto and use her wand to help in battles against the Akatsuki. Another idea is for Naruto characters to visit Mewni. Sasuke might be intrigued by the magic there and try to learn some new techniques.
Maybe the main villain is a corrupted ninja who once was on the side of good but was seduced by the power of the dark side. He now leads the forces of evil and has a personal vendetta against Naruto Star, seeing him as a threat to his newfound power and plans.
In this fanfiction, Naruto Star could be transported to a different dimension where the forces of evil have a completely different set of rules and powers. He has to quickly adapt and find a way to use his own skills in this new environment. Along the way, he meets new friends and foes, and his understanding of good and evil is put to the test as he tries to find his way back home while also fighting the forces of evil.
One interesting crossover could be the characters from Naruto learning about the magic in Star vs the Forces of Evil. For example, Naruto might be intrigued by Star's magic wand and try to understand how it works compared to his own chakra-based techniques.
In the 'evil Naruto lemon fanfiction', 'evil Naruto' is likely to have a different moral compass. The original Naruto is known for his positive values like friendship and perseverance. However, 'evil Naruto' may discard these values and focus more on self - gain and power, regardless of the consequences to others.
I think Hinata could be an ally. She has always been in love with Naruto and would not stand by while he is in danger from Dark Naruto. Additionally, Shikamaru is smart and strategic. He might see the threat of Dark Naruto to the village and decide to assist Naruto, using his intelligence to come up with battle plans.
The characters' powers would interact in really interesting ways. Star's teleportation magic could give her an edge in a fight against ninjas who rely on more traditional movement techniques. But the ninjas' stealth and tracking abilities could counteract that. For instance, a ninja like Kakashi could potentially track Star's movements even when she teleports. And when it comes to power - ups, Naruto's Sage Mode gives him enhanced physical abilities and sensory perception. This could be used to counter Star's more powerful magic forms, while Star's Butterfly form could pose a great challenge to the ninjas with its increased strength and magic capabilities.