Who are the main characters in a 'classic sonic meets shadow fanfiction'?

In such a fanfiction, they might start as rivals. Sonic, with his speed and carefree attitude, could initially clash with Shadow's more brooding and serious nature. For example, they could compete in a race across a fantastical landscape filled with loops and obstacles. Sonic would be in it for the thrill, while Shadow might see it as a test of his own abilities.

Dr. Eggman could be a great main villain. He might have a new plan that involves both the power of Sonic Underground's music and the Chaos Emeralds that Shadow guards. He could try to create a device that amplifies negative emotions through music and uses the Chaos Emeralds' power to spread chaos everywhere.

Obviously, Sonic and Maria are the main characters. Sonic is known for his super speed and heroic nature, while Maria is often portrayed as a kind - hearted and intelligent girl.

There could also be other characters depending on the specific fanfiction. Some might include Dr. Eggman as an antagonist, always trying to cause trouble for Sonic and the Freedom Fighters, or other minor characters that add to the story's complexity and depth.

Obviously, Sonic and Queen Aleena are the main characters. Sonic, the blue blur known for his speed, and Queen Aleena who might have her own unique powers and leadership qualities in the fanfiction.

Tails is a very popular character to include. He is Sonic's best friend and his technical skills can add a lot to the story. For example, he could help Sonic and Shadow figure out some complex machinery or technology that is part of the plot.

Classic Sonic could be the most interesting. He represents the roots of Sonic. When he meets Modern Sonic, he might be curious about all the newfangled things like Sonic's modern shoes or his new power - ups. His reactions to the modern elements would add a lot of charm to the story.

It could be Dr. Eggman. He might have manipulated Shadow into kidnapping Sonic. Maybe he promised Shadow something in return, like power - ups for his abilities. Dr. Eggman wants to study Sonic's speed and abilities, so he uses Shadow as a tool to get Sonic in his clutches.

Sonic himself is usually really popular. Whether it's the Sonic from Sonic X or Sonic Underground, he's the main hero and often at the center of the action. People love reading about his adventures and how he deals with the challenges in the combined universes.

Sonic, of course, is a must - have. But also Knuckles from both universes. In Sonic Boom, Knuckles is a bit more of a muscle - brained character in a fun way, while the classic Knuckles is more serious about guarding the Master Emerald. When they meet, there could be some hilarious misunderstandings at first, like Sonic Boom Knuckles trying to show off his strength to the other Knuckles, but then they end up teaming up against a common threat.