Well, for a crossover, Leni from The Loud House and Clover from Totally Spies would be an interesting duo. Leni may seem ditzy but she has a big heart and a great fashion sense. Clover could use Leni's fashion knowledge for better disguises. And then there's Lynn. She could team up with any of the spy girls, but especially with Alex. Lynn is athletic and competitive, and Alex has her own set of physical skills. They could compete in a friendly way while still working towards the common goal of defeating the bad guys in the crossover.
In a crossover fanfiction, Luna from the Loud House and Alex from Totally Spies would be a great team - up. Luna has her rocker - chick vibe and is not afraid to take risks, which would complement Alex's adventurous and sometimes impulsive nature. Another likely pair would be Lori and Sam. Lori is used to being in charge and Sam is a natural leader among the spies. They could lead the combined group of Loud siblings and spies in their mission to save both their worlds from a common threat.
I think Lincoln from The Loud House and Sam from Totally Spies could team up. Lincoln is smart and good at coming up with plans, and Sam is the most level - headed of the spy girls. They could work well together. Also, Lola and Clover might team up. Lola is all about beauty and winning, and Clover is stylish and confident. They could use their charm to distract villains while the others do the more action - packed parts of the mission.
Obviously, the main characters from The Loud House like Lincoln, who could be the one to bridge the two worlds together. And from Totally Spies, Sam, Clover, and Alex. They would be the main characters as they are the core of the Totally Spies team. Maybe Lincoln's sisters like Luna and Luan could also play important roles, like helping the spies with their local knowledge or unique skills. For example, Luna could use her music to communicate secret messages or Luan could use her pranks to create distractions during a mission.
One idea could be that the Loud sisters get recruited by WOOHP. Maybe Lincoln accidentally discovers a WOOHP gadget and the spies come to retrieve it. They notice the Loud sisters' unique skills and talents. For example, Lori's bossy nature could be useful for leading missions, and Leni's fashion sense could help with disguises. They all team up to stop a villain who is using a new technology to take over the world.
Well, perhaps a mad scientist creates a portal that connects the two universes of The Loud House and Totally Spies. The Totally Spies are lured into the portal and end up in Royal Woods. They meet the Loud family and soon realize that the same scientist is planning to use a powerful device in Royal Woods to control the minds of people all over the world. The Loud kids and the spies then form an alliance. The spies teach the Loud kids some basic self - defense and spy techniques, while the Loud kids show the spies how to blend in with the local community and use everyday objects as tools to stop the scientist.
Luna could also be a great character to interact with Casper. Given her love for all things cool and different, she would probably be really excited to meet a friendly ghost. She might even write a song about their encounter.
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.
I think Spongebob and Lincoln would be really interesting. Spongebob's wacky optimism and Lincoln's attempts to navigate his crazy family life could create some really fun and comical situations. They could learn from each other - Spongebob about family unity from Lincoln, and Lincoln about pure joy and simple living from Spongebob.
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.
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.