Definitely Hannibal and Morticia. Morticia's love for all things dark and beautiful would be an interesting match for Hannibal's refined tastes. They could have long discussions about aesthetics, death, and the art of being different.
Another interesting pairing could be Hannibal and Wednesday. Wednesday's dark and brooding nature, along with her intelligence, might make her a worthy counterpart for Hannibal. He could see her as a young protege of sorts, or she could be the one to outwit him in the end.
Morticia Addams could also be very interesting. Her elegance and grace combined with her love for all things dark and Gothic would put her in an interesting position with Hannibal. She has a certain allure and mystery about her, and her relationship with Gomez is a study in passion. How she would react to Hannibal's more sinister side, and how he would view her beauty and charm in the context of his own warped world, would be fascinating to explore.
Draco Malfoy and Wednesday Addams. Draco's haughty and somewhat mean - spirited nature could be a great contrast to Wednesday's cold and deadpan personality. They could have some really intense verbal battles, and maybe in the end, learn a bit from each other.
A Hannibal and Addams Family crossover fanfiction could be filled with all sorts of wild interactions. The Addams Family has their own set of values and morals that are quite different from the 'normal' world. Hannibal, on the other hand, has his own code which often involves violence and a twisted sense of justice. In a crossover, we might see Gomez and Hannibal discussing their different approaches to life and death. Morticia could have some interesting conversations with Hannibal about beauty and decay. And the children of the Addams Family could either befriend or be terrified of Hannibal, depending on how the story unfolds.
Well, it could be really dark and twisted. Imagine Hannibal Lecter somehow getting involved with the Addams family's strange and macabre world. Maybe he's invited to one of their dinner parties where they serve their usual 'exotic' dishes. And he might find their unique family dynamics and acceptance of the abnormal quite fascinating.
Yukari (from Persona 3) and Chie (from Persona 4). Yukari is very outspoken and has a bit of a sarcastic side, while Chie is energetic and a bit of a tomboy. Their different personalities could lead to some really fun and comical interactions, especially when they're facing Shadows together or just hanging out in the school setting.
Morty and Brian could be a great pairing. Morty is often the more moral and naïve character in Rick and Morty, while Brian is the somewhat jaded family dog in Family Guy. They could have conversations about life, mortality, and the meaning of existence. Morty might be intrigued by Brian's writing and Brian could be both amused and concerned by Morty's adventures with Rick.
Definitely the Flash and Iron Man. Tony Stark's high - tech gadgets and intelligence combined with the Flash's super - speed would make for some really cool scenes. They could work together on building some sort of super - fast vehicle or weapon. Another interesting pairing would be the Flash and Captain America. Steve Rogers' leadership and combat skills along with the Flash's speed could be a great combination for taking on enemies. The Flash could quickly get Steve into strategic positions during battles.
Another great pairing could be Sasuke and Griffith. They both have a certain level of ambition and a thirst for power. They might start off as rivals, constantly trying to one - up each other in terms of strength and influence. But as they face greater threats together, they could learn to respect each other and even form an uneasy alliance. It would be fascinating to see how their different motives play out when they are forced to work together.
I think Spyro and Kakashi would be an interesting pair. Kakashi is a very experienced and intelligent ninja, and Spyro is a powerful dragon with unique abilities. Kakashi could be intrigued by Spyro's magic and his different combat style. And Spyro could be in awe of Kakashi's Sharingan and his vast knowledge of ninjutsu. Also, Spyro and Sakura could be a good pair. Sakura has grown into a strong kunoichi, and Spyro could help her further develop her combat skills, especially in terms of using her strength in more creative ways.