They could be in a competition set up by an evil gaming overlord. The prize is the ability to rewrite the rules of all video games. Samus and AVGN start as rivals but quickly realize they need to work together. Samus provides the physical combat abilities while AVGN offers strategic advice based on his years of gaming experience.
Perhaps in the fanfiction, Samus is on a mission to retrieve a powerful and corrupted video game cartridge. This cartridge is causing glitches in the entire gaming universe. AVGN, being the self - proclaimed video game expert, joins her. Along the way, they have humorous exchanges as Samus tries to understand AVGN's strange references to retro games and bad game design.
One idea could be a crossover adventure where Sonic and Samus team up to stop a powerful, universe - threatening villain. They could combine their unique abilities, like Sonic's speed and Samus' combat skills and advanced weaponry.
To develop Samus, make her more vulnerable in the fanfiction. Let her show emotions other than her typical stoic self. For example, she could be frustrated with some of the wacky situations they get into with AVGN. As for AVGN, develop his backstory. Maybe he had a difficult childhood related to games that made him so critical. As the story progresses, he starts to let go of some of that negativity and becomes a more positive force in their adventures.
One idea could be a crossover adventure where Megaman X and Samus team up to fight a common enemy that threatens both of their worlds. They could start off as rivals, not trusting each other's methods at first, but as they face challenges together, they learn to respect and rely on one another.
There could be a plot where Samus is sent to the Zelda universe to investigate some strange energy readings. There, she meets Link, and they initially distrust each other. But as they face various challenges together, like fighting off hordes of monsters and solving ancient puzzles, they grow closer. Another idea is that a group of interdimensional thieves steal something important from both Link and Samus. So, they have to work together to track down these thieves across different dimensions.
Well, for a Naruto and Samus fanfiction, perhaps a plot where Naruto is on a mission in an unknown realm and he meets Samus. They initially don't trust each other but soon realize they share a common goal of stopping a powerful, dark force that is spreading chaos in that realm. Or, Samus could be in search of a powerful energy source which she discovers is related to chakra in the Naruto world. And then there's the idea of a training arc where Samus teaches Naruto some of her combat skills and Naruto teaches her about ninjutsu.
Maybe Samus and Baby Metroid get separated. Samus then has to go through a series of dangerous challenges to find it again. Meanwhile, Baby Metroid is befriending some of the local creatures on the planet it landed on, and they help it survive until Samus arrives. This could show the bond between different species in the Metroid universe.
One common theme is the battle between light and dark. Samus represents the light side, being a bounty hunter who fights for good in the Metroid universe, while Dark Samus is, as the name suggests, the dark counterpart. Their relationship in fanfiction often explores this contrast.
A third plot could be that there is a tournament in a crossover universe where the best warriors from different dimensions are invited. Samus and Snake both enter, thinking they are the best in their own right. Initially, they are competitors, trying to outdo each other in the various challenges of the tournament. But as they face tougher opponents together, they realize that by teaming up, they have a better chance of winning. So they form an alliance and in the process, they develop a mutual admiration for each other's combat styles and strategic thinking.
A more light - hearted non - adult fanfic could be about Fox and Samus accidentally swapping their abilities. Fox suddenly has Samus's power suit and weaponry, while Samus has Fox's flight and agility. They have to figure out how to function in each other's shoes while also dealing with a minor villain who tries to take advantage of their confusion.
One interesting aspect could be the unique combination of characters. The AVGN's edgy and critical nature might contrast or interact in an unexpected way with Mr. Bucket. It could lead to some really creative and humorous storylines.