Robin from Young Justice and Agent A would likely have an interesting interaction. Robin is highly intelligent and a great detective in his own right. Meeting Agent A, who may have different methods of investigation, could lead to some really cool exchanges. They could compare notes on cases and share their insights on solving mysteries.
Flynn from Shake It Up and Ernie from KC Undercover could have a hilarious interaction. Flynn is often the comical sidekick in Shake It Up, and Ernie has his own brand of humor in KC Undercover. They could get into all sorts of wacky situations together, like accidentally triggering a spy gadget while trying to help with a dance routine, or getting lost in a maze - like dance studio while looking for a missing piece of spy equipment.
Sakura and Deidara. Deidara is an artist with a very unique view of the world. Sakura might be intrigued by his art while at the same time being repelled by his violent and destructive tendencies. Their conversations could be a mix of philosophical debates about art and power, and physical confrontations as they are on opposite sides.
They could interact with a bit of wariness at first. Bucky, knowing his past and how it might be perceived by T'Challa's family, would be cautious. But T'Challa's daughter, being open - minded, would start a conversation. Maybe she would ask him about his life before all the chaos. And Bucky would respond in a guarded but honest way.
Well, obviously the Avengers themselves are the main characters affected. Captain America would be one of the most affected. Given their long - standing friendship, any shock from Bucky would deeply impact Steve Rogers. Tony Stark would also be greatly affected. Their relationship has been rocky in the past, and if Bucky does something unexpected, it would likely stir up new tensions or alliances between them.
Meliodas and Zeldris would be very likely to have an interesting interaction. They are brothers with a complex history. In a crossover, their relationship could be explored further. Maybe they start off on opposite sides as per their respective groups, the Seven Deadly Sins and the Ten Commandments, but then find common ground due to their family ties. Another pair could be Ban and Estarossa. Ban's quest for immortality and Estarossa's power - related to immortality in some way - could lead to some intense and thought - provoking conversations and battles between them.
Marinette and Adrien would definitely have an interesting interaction. Marinette is secretly in love with Adrien, and at a sleepover, there could be all sorts of awkward and cute moments between them. Maybe they end up in the same sleeping bag by accident. Alya and Nino could also have a great interaction. They're both best friends with Marinette and Adrien respectively, and they could be the ones planning all the fun activities for the sleepover. Another pair could be Chloe and Sabrina. Chloe might be her usual bossy self at the sleepover, and Sabrina would be following her around. But there could be a moment where Sabrina stands up to Chloe, which would be an interesting turn of events.
Sharon Carter could be in the fanfic. She could be the one who provides some medical or scientific insights into what's happening to Bucky. Maybe she has some knowledge of the experimental substances that might be related to Bucky's growing belly and tries to use her resources to help him.
One possible plot could be that Bucky, while on a mission in Wakanda, accidentally stumbles upon T'Challa's daughter during her secret training. She's initially cautious but then realizes Bucky is different from what she expected. They start to share stories about their different worlds and form an unlikely friendship.
I think Iron Man and Max would have an interesting interaction. Iron Man is a genius with his high - tech gadgets and a bit of an ego. Max, on the other hand, is a strong - willed leader. They might start off butting heads as they both like to be in control. But as they get to know each other's capabilities and the importance of their respective groups, they could form a great partnership. Iron Man could be impressed by Max's natural leadership and Max could be in awe of Iron Man's technology.