Another great pairing could be Piccolo and Sailor Mercury. Piccolo is the strategic thinker among the Z - fighters, and Sailor Mercury is the brains of the Sailor Scouts. They could work together to analyze the enemy's weaknesses and come up with plans to defeat them. Also, Piccolo's unique abilities like his regeneration and energy blasts combined with Sailor Mercury's water - based attacks and technological skills could make for an interesting combination.
I think Sailor Moon and Goku would be a really interesting combination. Sailor Moon is all about love and justice, and Goku is just a pure - hearted fighter. They could learn a lot from each other. Goku could teach Sailor Moon about physical combat and pushing her limits, while Sailor Moon could show Goku the power of love and friendship in a different way than he's used to in his own universe.
A Sailor Moon and Dragonball Z crossover fanfiction might start with a strange rift in the universes. Sailor Mercury detects an unusual energy signature that seems to be a mix of magic and ki. As they investigate, they run into Goku who is also curious. The two groups then find out that there's a powerful being trying to merge their worlds for its own evil purposes. The Sailor Guardians and the Z - fighters would then have to put aside their differences in fighting techniques and beliefs to stop this threat. They might have some funny moments like Vegeta getting annoyed with Sailor Mars' sassy attitude or Sailor Venus being in awe of Goku's strength.
One possible plot could be that the Sailor Scouts are facing a new and extremely powerful enemy that they can't defeat on their own. Goku and his friends from Dragonball Z sense the danger across the dimensions and come to help. The Scouts are initially shocked by the Saiyans' power levels but then start to learn from them about ki control. Together, they combine their powers, like the Sailor Scouts using their magic with the Z - fighters' ki blasts to take on the foe.
I think Sakura would team up well with a healing - type Pokegirl. Sakura is a medic - ninja in Naruto, and a Pokegirl with healing abilities, like Chansey, would be a great partner. They could both take care of the injured during battles and adventures. And Sakura could also learn some new techniques from the Pokegirl's unique healing powers, while the Pokegirl could learn some basic self - defense ninja moves from Sakura.
Captain America. He values honor, courage, and justice, which are all qualities that Robin also embodies. Cap would respect Robin's skills in combat and detective work. They could lead a team together, with Cap providing the strategic leadership on a large - scale battlefront, while Robin uses his stealth and intelligence to gather intelligence and take on enemies from the shadows.
Hal Jordan from Green Lantern and Iron Man from Marvel would be a great team - up. Hal is a fearless test pilot turned Green Lantern, and Iron Man is a brilliant inventor. They could combine their skills in combat and technology. For example, Hal could use his ring constructs to assist Iron Man in creating new and more powerful armors, while Iron Man could help Hal upgrade his ring's capabilities with his advanced tech knowledge.
Yang and Johnny Cage would be a likely pair. Yang is brash and confident, and Johnny Cage is full of himself and loves the spotlight. They could have some really fun banter while fighting together. Yang's brawler style could complement Johnny Cage's martial arts and showbiz - influenced fighting style. Also, they could both learn from each other's different combat cultures.
Another candidate could be Dialga from Pokemon. Dialga has the power to control time. In a crossover, if it could use its time - control abilities effectively against the Dragonball Z characters, it could be very powerful. For example, it could freeze time and then attack its opponents without them being able to react. But again, Goku has shown the ability to break through all kinds of limitations, so he might still find a way to defeat Dialga in the end.
Sailor Mercury and Batman could be likely allies. Sailor Mercury is intelligent and tech - savvy, much like Batman. She could help him with any technological problems he might face in his fight against crime, while he could offer her his combat and detective expertise. For instance, if there was a villain using advanced technology to cause chaos in both their worlds, they could pool their knowledge to stop the bad guy.
Ash from Pokemon and Yuya from Yugioh Arc V would be very likely to team up. Ash is known for his adventurous spirit and his love for Pokemon, and Yuya is a skilled duelist with a strong sense of justice. Their combined skills would make them a formidable team. They could learn from each other, with Ash teaching Yuya about the bond between a trainer and Pokemon, and Yuya showing Ash the strategies behind Yugioh duels.