Maybe there's a plot where they have a misunderstanding at first. Robin thinks Wonder Girl is too reckless in battle, while Wonder Girl believes Robin is too controlling. But through a series of events, they come to understand and respect each other more, and in the end, they become a stronger team.
Perhaps there's a fanfic where Robin and Girl Wonder accidentally swap their minds. This would lead to a lot of comical situations as they try to act like each other while also trying to figure out how to reverse the situation. But it could also have some deeper moments as they understand each other better through this strange experience.
One idea could be that Robin and Wonder Woman team up for a special mission in a hidden, ancient temple. They have to solve puzzles that require both Robin's detective skills and Wonder Woman's knowledge of ancient lore. Another could be a story where Robin gets injured during a battle and Wonder Woman takes it upon herself to train him in new combat techniques to make him stronger.
One plot idea could be that Arsenal and Wonder Girl are on a mission together and get stranded in an alternate dimension. They have to rely on each other's skills to survive and find a way back home. Arsenal's marksmanship and Wonder Girl's super strength would be put to the test.
Another plot could be a time - travel adventure. Maybe a powerful magic spell goes wrong and sends them back in time. There, they meet younger versions of the Justice League members. They have to figure out how to get back to their own time while also making sure they don't accidentally change the future in a bad way. This would involve a lot of action and also some interesting character interactions as they see the heroes they know in a different light.
One great fanfiction could be about Robin and Girl Wonder teaming up for a secret mission. Maybe they have to infiltrate an enemy base. The story could focus on their growing trust and friendship as they face various challenges together.
One idea could be Robin trying to prove himself to Batman in a mission within the Young Justice framework. Maybe there's a new villain in town that only they can stop together.
A really interesting fanfiction might be set during a time when the team is on a break. Robin and Wonder Girl decide to train together privately. During this training, they not only improve their combat skills but also have heart - to - heart conversations. This leads to a stronger bond between them as friends and teammates.
A plot could revolve around a mystery in Gotham that seems to be related to Raven's dark magic past. Robin, being the detective he is, teams up with Raven to figure it out. Along the way, they discover that there are forces trying to use Raven's powers for evil in Gotham. They have to not only stop these forces but also deal with their growing feelings for each other, which they initially try to hide.
One idea could be a story where Nightwing has to train Robin in a new and dangerous combat technique. They could face off against a powerful new villain in Young Justice that specifically targets their mentor - protégé relationship.
One idea could be that Robin is on a solo mission in Gotham and crosses paths with Catwoman. She initially tries to mislead him, but he sees through her tricks. They end up teaming up briefly to take down a mutual enemy who is stealing valuable artifacts from both the Batcave and Catwoman's hideouts.