They could start off as rivals. Maybe there's a competition in a magical tournament where both are participating. Aladdin uses his quick thinking and agility, while Hercules uses his raw power. As the story progresses, they realize that they can learn from each other and become friends. They start to work together, with Aladdin coming up with clever plans and Hercules providing the muscle to execute them.
Aladdin could be in awe of Hercules' strength. He might ask Hercules to show off his feats of strength, like lifting a huge boulder. Hercules, in turn, would be interested in Aladdin's street - smart ways. For example, Aladdin could teach Hercules how to haggle in the marketplace.
Imagine Aladdin and his friends, like Abu and Genie, are traveling and they encounter Hercules who is in the middle of a fight with a monster. Aladdin could use his magic carpet to distract the monster, giving Hercules an opening to strike. Hercules would then be grateful and offer to help Aladdin on his next adventure. They could bond over their shared sense of justice and their desire to protect the innocent.
One idea could be that Aladdin, while on one of his adventures in the marketplace, stumbles upon a magical item that transports him to Hercules' world. There, he meets Hercules and they team up to defeat a common enemy, like a powerful sorcerer who is causing chaos in both their realms.
Harry Potter would likely be in awe of Hercules' strength at first. He might be a bit cautious too, as Hercules is from a different world of gods and myths. But they would probably quickly become friends as they both have a strong sense of justice. Hermione would be very interested in Hercules' stories about the Greek gods and would constantly ask him questions, trying to learn as much as she could.
Naruto might be intrigued by Nunnaly's calm and gentle nature. He could introduce her to his friends in the Hidden Leaf Village. They could have conversations about their different worlds. For instance, Naruto could tell Nunnaly about his dreams of becoming Hokage, and Nunnaly could share her own hopes for a peaceful world.
Conor might initially be in awe of Achilles. Since Achilles is a great warrior, Conor could look up to him and try to learn from his combat skills. For example, he could ask Achilles to teach him how to use a spear effectively.
Aladdin would probably be very curious about the Star Wars characters. He might be in awe of their advanced technology, like lightsabers and blasters. He would likely try to learn from them. And the Star Wars characters would be intrigued by Aladdin's world, full of magic and mystery. For example, Han Solo might be interested in trading goods in the Agrabah marketplace. Princess Leia would likely be sympathetic to the plight of the poor in Aladdin's world and try to help. And Chewbacca would be this big, furry, and strange - looking creature to the people of Agrabah, but they would soon realize he's friendly.
The Sultan himself could capture Aladdin if he were misled into believing that Aladdin was a threat to Agrabah. Maybe some false rumors were spread about Aladdin planning to overthrow the Sultan. So, the Sultan, out of fear for his kingdom and his daughter, orders Aladdin's capture.
In a fanfic, the ponies and God of War characters could also have a conflict at first. The ponies' values of harmony and love might be at odds with the God of War characters' thirst for vengeance and power. However, as the story progresses, they could find common ground. For example, they could both realize that there are greater threats that require their combined efforts. The ponies could use their magic to help the God of War characters in battles, while the God of War characters could protect the ponies from the more brutal aspects of their world.
They could start as strangers who are initially suspicious of each other. For example, when Ben first arrives in the Avatar world, Aang might think he's a new kind of threat. But as they learn more about each other's powers and intentions, they begin to trust and cooperate. Ben could use his alien forms like Heatblast to help Aang in a fight against a fire - bending enemy, while Aang could use his air - bending to give Ben an advantage in aerial combat.
They could also interact in a more everyday - life - like way. Imagine the Gorillaz inviting the Powerpuff Girls to their home. Bubbles would be excited to see all the cool musical instruments. Blossom would be interested in their creative process. Buttercup might get into a friendly wrestling match with Russel. 2D could draw pictures of the Powerpuff Girls, and Murdoc would try to convince them to be part of his next big scheme. Noodle could cook a meal for everyone, and they would all share stories about their different worlds.
The characters could interact through a magical portal. For example, Naruto might accidentally stumble through a portal into the Please Teacher world. He'd be confused at first but then start to make friends with the characters there, sharing his ninja stories.