Maybe there could be a plot where a new villain disrupts the Olympic Games. Sonic and Mario then have to put aside their rivalry not just in the games but also in saving the event. They might need to combine their unique abilities like Sonic's speed and Mario's jumping skills to defeat the villain and restore the Olympics. For example, Sonic could quickly scout the area while Mario uses his strength to take on the villain directly when they find him.
One idea could be a team - up between Sonic and Mario to compete in a new, super - difficult event that has never been in the Olympics before. They have to overcome their differences in speed and power - up usage to win.
One idea could be a friendly rivalry between Mario and Sonic that gets intense during the Olympic Games. Maybe they both want to prove who is the better athlete in a new and unique event.
One idea could be that Mario and Sonic team up to compete in a new, never - before - seen Olympic event. They have to overcome their differences in style and learn from each other to win.
The story involves Mario and Sonic coming together in the context of the Olympic Games. There are different levels of competition. Each character has its own set of skills that they use to try and win. For example, Mario might use his jumping skills from his adventures in the Mushroom Kingdom, while Sonic uses his super - speed. And there are also other characters from their worlds who participate, adding more fun and competition to the story.
One idea could be that Mario and Sonic have to team up to save both their worlds from a new, powerful villain that is threatening to merge their dimensions in a chaotic way. For example, Bowser and Dr. Eggman could accidentally awaken an ancient evil while arguing over who is the better baddie.
Well, a cool plot for Mario Sonic crossover fanfiction might involve a new character that can travel between their worlds freely and is causing chaos. Mario and Sonic initially suspect each other but then realize they need to join forces. For example, this character could be stealing power - ups from Mario's world and Chaos Emeralds from Sonic's world to gain ultimate power. They would have to explore both worlds, facing their respective villains' minions along the way.
One idea could be that Sonic and Mario have to team up to save both their worlds from a new, powerful villain who has the ability to manipulate time. This would force them to use their unique speed and jumping abilities in new and creative ways.
The main characters are Mario and Sonic.
Bowser can also be a great addition. He can be the antagonist who tries to cheat in the Olympics or cause trouble for Sonic and Mario. And from Sonic's side, Knuckles is a fan - favorite. His strength and gliding ability can make for some interesting interactions with the Mario characters. For example, he might get into a friendly competition with Donkey Kong over who is stronger.
Mario and Sonic themselves are the most obvious and popular choices. They are the main characters of their respective franchises and their rivalry is always exciting to explore.
Princess Peach from the Mario universe is often included. She can add a touch of elegance and sometimes be a damsel in distress or a helpful ally. Tails from Sonic's world is also popular. His intelligence and flying ability can be useful in various situations in the fanfiction, like helping Sonic and Mario solve puzzles or reach high places during the Olympic events.