Naruto would probably approach Bowser with his usual friendly and curious nature. He might ask Bowser a bunch of questions about his world and his powers. Bowser, being the big, tough villain he is, would likely be initially hostile or dismissive. But Naruto's persistence could break through that. They might end up having a conversation where Naruto tries to convince Bowser to be less of a bad guy, while Bowser tries to intimidate Naruto into leaving him alone.
Naruto would probably be very enthusiastic and friendly towards Kousei and the others. He would be curious about their world and their music. Kousei, on the other hand, might be a bit reserved at first but would gradually warm up to Naruto's energy. Naruto could share his stories of battles and friendship, and Kousei could share his love for music. They might even find some similarities in their struggles, like Naruto's fight against loneliness and Kousei's struggle with his past.
They would likely start with some mutual curiosity. Naruto would be intrigued by Rias's devilish appearance and powers, while Rias would be interested in Naruto's ninja abilities. They might exchange stories about their respective worlds, with Naruto talking about his village and his friends, and Rias sharing about the devil society. Interaction could also involve sparring sessions to test each other's strength.
Sesshomaru would likely be aloof and haughty at first. He might look down on Naruto as a mere human. Naruto, being his friendly self, would probably be curious about Sesshomaru and try to start a conversation. Sesshomaru might respond with cold remarks, but Naruto's persistence could gradually break through his icy exterior.
Naruto would be very curious about Wolverine's adamantium claws and his ability to heal. He would approach Wolverine with his usual friendly and open - minded attitude. Wolverine might be initially skeptical of Naruto's bright - eyed naivete but would come to respect his determination. They could start by sparring, with Naruto using his shadow clone jutsu and Wolverine using his claws. As they interact more, they would start to understand each other's values, like Naruto's belief in friendship and Wolverine's sense of loyalty, and form an unlikely alliance.
Noodlehammer Naruto would probably be really enthusiastic and a bit wacky due to his unique concept. The original Naruto might be initially confused but then get excited about the new ideas. They'd likely bond over their shared determination and love for the village.
If they were in a situation where they needed to combine their powers, Naruto's Sage Mode, which gives him enhanced strength, speed, and perception, could work well with Meliodas' Full Counter ability. Naruto could sense incoming attacks and Meliodas could then use Full Counter to send those attacks back with even greater force. Also, Naruto's Nine - Tails chakra could potentially merge with Meliodas' demon power in some way, creating a new and extremely powerful force. It could be like a combination of the raw power of the Nine - Tails and the unique abilities of Meliodas' demon form.
Naruto's chakra - based powers and Alucard's vampiric abilities could create some really cool interactions. For instance, Naruto's Rasengan could potentially be enhanced with Alucard's dark energy. Or Alucard could use Naruto's chakra to fuel some of his more draining attacks.
The characters' interactions would be complex. Hulk might just charge at Kratos out of instinct, seeing him as a potential challenger. Kratos, on the other hand, might hold back at first, trying to gauge the Hulk's power. Iron Man would likely try to scan Kratos to understand his abilities. Thor could start a conversation about their different pantheons.
Superman would probably be polite but a bit reserved when meeting the Avengers. He'd introduce himself simply and state his purpose, which is usually to help. Iron Man, on the other hand, might be a bit skeptical at first and make some snarky remarks. Thor would likely be more open - minded and see Superman as a worthy ally. Hulk might just be interested in seeing if he can take on Superman in a fight.
Artemis could be intrigued by Goku's energy. She might see it as something similar to the divine energy she's familiar with. So she could start asking him about it. And Goku would try his best to explain about ki, using his limited knowledge of such things. They could end up sharing stories about their respective battles and adventures.