One idea could be a story where all the Smash characters are transported to a new, unknown world and have to work together to find their way back. They face new challenges and enemies specific to this world.
One idea could be an OC who has a unique fighting style that surprises all the Smash Bros characters. For example, an OC that can manipulate time during battles, freezing opponents momentarily or speeding up their own attacks. Another could be an OC from a different dimension who enters the Smash Bros world to find a way to save their own realm. They would have to learn the rules of the Smash Bros battles and form alliances with some of the characters.
A plot could revolve around a new character being added to the roster secretly. This character has an unknown power that starts to disrupt the balance in the Smash Bros world, and the other characters must figure out who it is and stop them. For example, this new character could be causing glitches in the battle arenas, making it difficult for the regular characters to fight.
One interesting Super Smash Brothers fanfiction could be about the backstories of how the characters got into the Smash universe. For example, a story about how Kirby first discovered the Smash tournament and his adventures there. Another could be a crossover within the Smash world, like Mario and Link teaming up for a special mission in the Smash arena. There are also fanfictions that focus on the relationships between the characters, like the friendship or rivalry between Fox and Falco.
One idea could be a story where all the characters from different universes team up to face a new, unknown threat that is causing glitches in their worlds. For example, Mario, Link, and Pikachu working together in a way they never have before.
One idea could be a tournament where characters from both Dragon Ball and Smash Bros universes have to team up in unexpected pairs. For example, Goku and Kirby could be a team, with Goku providing the raw power and Kirby using his unique abilities to support. Another plot could involve a new villain that can absorb the powers of the fighters. This would force the heroes to come up with new strategies and power - ups to defeat him. A third idea is a time - travel plot where a character from Dragon Ball accidentally travels to the Smash Bros world and has to find a way back while also getting involved in the Smash Bros battles.
One idea could be an OC from a relatively unknown game getting invited to the Smash Bros universe. They have to learn the ropes of the unique fighting style there. Another could be an OC who has a special power that disrupts the balance in the Smash Bros world, causing both chaos and new alliances among the characters.
One idea could be exploring the backstories of the characters more deeply. Maybe a story about their childhood and how it shaped their relationship as brothers.
Some Super Smash Brothers lemon fanfiction might explore the backstories of the characters more deeply. For instance, a story about Samus and how she came to be in the Smash Brothers world. It could include her early training days and how she developed her skills, all while interacting with other characters in a fun and engaging way.
One interesting plot idea could be a character who is new to the Smash Bros universe and their reaction to meeting all the iconic characters. They could start off in awe, gradually learn the ropes of the battles, and form unexpected friendships or rivalries. For example, a character from a relatively unknown game enters and is initially intimidated by Mario and Link but then discovers they have unique skills that can hold their own. Another plot could revolve around a character's reaction to the constantly changing stages, like being really confused when suddenly transported to a new and wacky stage.
Perhaps there's a tournament in the Smash Bros world that Naruto enters. He's an unknown quantity at first, but as he battles, he shows off his ninja skills. The other fighters are amazed and start to study his moves. This could lead to some interesting training sessions between Naruto and characters like Captain Falcon, where they exchange fighting tips and Naruto learns about high - speed racing attacks from him.