Who are the most popular characters to include in a Mario and Sonic crossover fanfic?

Mario and Sonic are at the top of the list for sure. But in addition to Luigi and Tails, Princess Peach is often included. She can bring an element of needing to be rescued or she could also be a strong character helping out. Knuckles from Sonic's world is also popular. He has his strength and knowledge of the Chaos Emeralds, which can be crucial in a crossover story. There are also some fans who like to include Bowser and Dr. Eggman as the main antagonists, which makes for an exciting story.

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.

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 Luigi are always popular as they are the mainstays of the Mario Kart series. But when it comes to crossovers, Sonic is a top pick. His popularity and speed make him a great addition. Link from The Legend of Zelda is also a common choice. His unique look and abilities can add a different flavor to the races.

In sonic the hedgehog crossover fanfiction, Sonic himself is of course the main character. But other characters that are popular to include are Amy Rose. Her love for Sonic can create interesting relationship dynamics in crossovers. Another popular one is Dr. Eggman. His villainous nature can be a great source of conflict in crossovers with other characters. And then there are characters from other video game series that are also quite popular, like Link from The Legend of Zelda. His use of weapons and exploration skills could make for some really exciting crossovers with Sonic.

Mario and Sonic themselves are often paired up. They are the two main characters from their respective franchises, so it makes sense that fans like to write about their interactions. They can be rivals, friends, or reluctant allies in different fanfictions.

Obviously, Mario and Sonic themselves are the most popular. They are the main draws as they are the ones 'meeting' in this fanfiction concept.

Sebastian is often a popular choice. His demonic nature and his loyalty (in a rather twisted way) to Ciel make him a very interesting character to cross over. He can easily interact with characters from other dark or supernatural works, and his powers and suave personality can add a lot to a crossover story.

Princess Peach is often included. She can add a romantic element to the story, like if Bowser is still trying to win her over or if she has some role in mediating between Mario and Bowser. Another popular character is Luigi. He can be Mario's sidekick as usual, or he could have his own sub - plot where he tries to outdo Mario in dealing with Bowser.