In a Sonic Forces Infinite fanfiction, the plot could center around Infinite forming an unexpected alliance. He realizes that the real enemy is a greater power that is using both him and Sonic's side for its own gain. So, he teams up with Sonic and the gang to take on this new threat. This alliance could be full of mistrust at first, but as they face challenges together, they start to understand each other better.
One idea could be Sonic and Infinite teaming up against a new common enemy that threatens both their worlds. Maybe a powerful alien force arrives, and they have to combine their skills and speed to defeat it.
The unique dynamic between Sonic Forces Infinite and the rookie character can be really fascinating. It's the clash of different personalities and abilities that makes it interesting. Infinite is often portrayed as a complex and powerful character, while the rookie has their own charm and potential.
A possible plot for 'sonic meets sonic boom fanfiction' is that a strange rift in the dimensions brings Sonic and his friends from the classic Sonic world into the Sonic Boom world right when they are about to have a big celebration. However, the Sonic Boom characters are initially suspicious of these new arrivals. But as they start to realize that a common enemy is behind the rift, they join forces. Sonic and Sonic Boom Sonic could have a friendly competition to see who can defeat the most badniks during the adventure, which also helps them bond and understand each other's strengths better.
One plot idea could be Dark Sonic having to face a new villain that is even more powerful and is threatening to destroy his world. He has to find a way to control his dark powers even more to defeat this foe.
One idea could be Sonic discovers a magical land where all the characters are in an abdl state. He has to navigate this new world while also dealing with his own changed circumstances. For example, he might have to learn to control his new abilities that come with this state.
One interesting plot idea is Sonic being mistaken for a new superhero by the Avengers. He has to prove himself and his abilities to them. Another is when the Avengers' world is invaded by Sonic's enemies, and they have to work together to defeat them.
One idea could be that Sonic from Sonic X accidentally travels to the Sonic Boom universe and has to adapt to the different environment and new versions of his friends. Maybe he teams up with Sonic Boom Sonic to defeat a common enemy that has found a way to cross between the two universes.
In some fanfictions, they might explore the differences in their personalities. For example, Classic Sonic's more simplistic and straightforward approach contrasted with Modern Sonic's more complex and sometimes cocky attitude. They could start off not getting along due to these differences but then learn to work together. Maybe there's a story where they are both trapped in a strange dimension and have to rely on each other's skills. Classic Sonic's spin - dash and ability to handle more 2D - like terrains, while Modern Sonic can use his homing attack and boost in the more complex 3D areas of the dimension.
Obviously, Infinite himself is a must - include. His complex character with his powers and his connection to the Phantom Ruby can drive a lot of the story. Sonic is also essential as he is the main hero and his interactions with Infinite can be really interesting. Tails could also be included as he can provide the technical support and his loyalty to Sonic adds another layer to the story.
One idea could be a crossover adventure where Sonic and the Mane Six team up to stop a powerful villain that threatens both their worlds. They could combine their unique abilities, like Sonic's speed and the magic of the Mane Six.