Definitely Phoenix Wright and Batman. Phoenix is all about the law and finding truth through legal means, while Batman is a vigilante who operates outside the law most of the time. Their interactions would be full of tension and interesting exchanges. Another great pairing could be Maya Fey and Robin. Maya has her spiritual powers, and Robin is Batman's sidekick with his own set of skills. They could have an adventure together, with Maya using her powers to help Robin solve mysteries.
Well, Apollo Justice and Alfred Pennyworth could be an unexpected but interesting pair. Apollo has his ability to perceive lies, and Alfred is the wise and resourceful butler. Alfred could teach Apollo some of his wisdom, and Apollo could use his skills to help Alfred protect the Wayne Manor. And then there's Athena Cykes and Oracle. Athena's ability to read emotions could be useful in understanding Oracle's situation, and they could work together to stop a cyber - crime that threatens both their universes.
Batman Beyond and Wonder Woman would also be an interesting combination. Wonder Woman's warrior - like nature and her connection to ancient mythology could be an interesting foil to Terry's futuristic, urban - based crime - fighting. They might team up to stop a threat that combines both ancient magic and modern technology, like a villain using an ancient spell to control high - tech weapons.
Ichigo and Sailor Moon herself would be an interesting pairing. Ichigo is a strong - willed fighter in Bleach, and Sailor Moon has a pure heart and great power. Their personalities are quite different, but they both have a strong sense of justice. They could learn a lot from each other, like Ichigo could teach Sailor Moon some combat skills, and Sailor Moon could show Ichigo the power of love and friendship in fighting evil.
I think a really intriguing pairing would be Grover and Olaf. Grover is this nature - loving satyr, and Olaf is this innocent and fun - loving snowman. Grover could be constantly worried about Olaf melting in the wrong conditions, while Olaf could introduce Grover to the joys of just having fun without so much worry. Also, Jack Frost from the Frozen - adjacent lore and Percy could be a great pair. They both have a connection to the cold and water in different ways, and their powers could either clash or work together in interesting ways.
Another interesting pairing could be Batman and Daisy Johnson. Daisy has her inhuman powers, especially her seismic abilities. Batman could be intrigued by her powers and try to find ways to use them effectively in combat. And Daisy could learn a lot from Batman's combat training and his no - nonsense attitude towards fighting crime. They could form a strong duo when it comes to facing enemies that require both brute force and strategic thinking.
I think Makoto Naegi and Robin would make an interesting pair. Makoto represents hope and Robin is always there to support Batman. They could learn from each other's positive outlooks. Also, Kyoko Kirigiri and Batman himself could be a great pairing. Kyoko's detective skills are top - notch, and she could either assist Batman or be a bit of a mystery for him to figure out as she has her own secrets.
One interesting crossover could be in a courtroom setting. Imagine Phoenix Wright from Ace Attorney defending Batman in a Gotham court. Batman's rogues' gallery could be witnesses, and Phoenix would have to use his legal skills to prove Batman's actions were just. Another crossover could involve the investigation aspect. Batman's detective skills combined with the Ace Attorney's unique way of uncovering evidence would make for an exciting story. For example, they could be investigating a crime that has ties to both Gotham and the Ace Attorney universe, like a new villain using legal loopholes to commit crimes.
Sasuke and Black Widow. Both are complex characters with a dark past. They could bond over their experiences of loss and redemption. Black Widow might be able to teach Sasuke some new combat techniques, while Sasuke could show her some of his ninjutsu skills. It would be interesting to see them on a stealth mission together.
Eggsy and Iron Man would make a great pair. Eggsy is a bit more rough - around - the - edges and from a different background, while Tony Stark is a genius billionaire. They could bounce off each other with their different perspectives. Eggsy might be in awe of Stark's technology at first, but then start to contribute his own unique ideas, and Stark could be amused and intrigued by Eggsy's street - smart solutions to problems.
I think Loki and Mal would make a very interesting pairing. Loki is known for his trickery and Mal has her own devious side. They could either be at odds, constantly trying to out - scheme each other, or they could team up for some self - serving purpose. Their combined cunning could lead to some very unpredictable and exciting storylines.