One common theme is the power dynamic between them. Given their different natures, the exploration of who has more power in the relationship is often seen. Another could be redemption, perhaps Slade seeking redemption through his relationship with Robin.
Common themes in slade x robin yaoi fanfic often involve a lot of emotional turmoil. Since it's a yaoi relationship, there will be the exploration of romantic feelings between the two. Also, themes of redemption might come up, like whether Slade can be redeemed through his relationship with Robin. There could also be themes related to secrecy and forbidden love, as their relationship might not be accepted in their world.
One common theme is the struggle for control. Slade's possessiveness often leads to a power struggle with Robin who values his independence. Another theme could be the blurred lines between love and obsession. Since Slade is possessive, it can seem like his feelings cross over from just caring to being overly obsessed.
Common themes might include power dynamics. Given Slade's more experienced and often menacing nature compared to Robin, there's often a play on who has the upper hand in the relationship. Another could be redemption, where Slade might be on a path to redemption through his relationship with Robin.
One common theme is the idea of redemption. Slade, being a complex and often villainous character, might find redemption through his relationship with Robin. Another theme is the power dynamic. Robin, as the younger and more 'good - natured' of the two, often has to navigate his relationship with Slade who has more power and experience.
One common theme could be the power dynamic between Slade and Robin. Since Slade is often portrayed as more powerful and experienced, it creates an interesting dynamic in the fanfiction. Another theme might be the forbidden nature of their relationship, considering their different sides in the story's context.
One common theme is the struggle between their hero identities and their personal feelings. They are both vigilantes in Gotham, and often they have to put their duties first, which creates tension in their relationship. Another theme is the idea of mentorship turned into something more. Since Nightwing was once Robin, there's a connection there that can develop into a romantic one. And of course, there's the theme of secrecy, as they may not want to expose their relationship to the rest of the Bat - family or the public.
One common theme could be the exploration of their relationship's development. It might start from a friendship and gradually turn into something more romantic. Another theme could be the challenges they face as a couple, like dealing with their different roles in their respective worlds.
One common theme is power dynamics. Slade is often portrayed as more powerful, and the story may revolve around how he uses that power to harm Robin. Another could be revenge, where Slade has a motive to hurt Robin for something that happened in the past.
I'm sorry, I don't have specific fanfiction to recommend directly. But you can try searching on popular fanfiction websites like Archive of Our Own. There are likely to be many works about Robin x Slade in the yaoi genre on such platforms.
One common theme could be friendship evolving into something more. Another might be the two characters facing challenges together.