The exploration of new worlds is also common. As Sonic is from his own game - based world and Goku from the Dragon Ball universe, fanfiction writers often create new settings where both characters can interact. This could be a merged universe or a new dimension that they are transported to. These new worlds add an element of mystery and adventure to the stories.
It's really hard to say. Goku has the power to destroy planets and reach incredible levels of strength with his Super Saiyan forms. However, Naruto has the power of the tailed beasts and his own sage mode which gives him a huge boost in power. And Sonic, while he may not have the raw power like the other two in terms of destruction, his speed is so great that he could potentially outmaneuver both of them. So it really depends on the situation and how the author writes it.
In a Metal Sonic x Sonic Fanfic, the action and adventure aspects can be really exciting. Writers may create new challenges for Sonic and Metal Sonic to face together or against each other. For example, they could be forced to team up to defeat a greater evil that threatens their world. This kind of fanfic also gives a chance to delve into the emotions of the characters. Metal Sonic, although a machine, might show signs of evolving emotions or at least a form of artificial intelligence - based loyalty or rivalry towards Sonic.
A 'sonic x sonic unleashed fanfic' could be really interesting. It might explore new adventures for Sonic in the context of the Sonic Unleashed world. Maybe it shows Sonic facing new challenges or forming new relationships within that setting.
In my opinion, Goku has more experience in fighting powerful opponents on a universal scale. He has fought against gods and demons. Sonic, on the other hand, mainly deals with threats to his own world. But Sonic's speed is not to be underestimated. He could potentially outmaneuver Goku and find a weakness. However, Goku can constantly increase his power during a fight. So, again, it's not clear who would win.
One interesting idea could be the clash of their different power systems. Goku has his ki-based attacks and Super Saiyan forms, while Sonic has his speed and Chaos Emerald powers. Maybe they could have a friendly sparring match to test each other's abilities.
One interesting 'naruto goku sonic fanfic' could be about a crossover adventure where Naruto, Goku, and Sonic team up to save a multiverse that is being threatened by a powerful villain. They each bring their unique abilities like Naruto's ninjutsu, Goku's ki attacks, and Sonic's super speed to the fight.
It could be about a very dark and tragic scenario where Sonic meets his end in a fan - created story. Maybe it involves a powerful villain finally overpowering Sonic in a unique and often unexpected way.
Well, 'sonic x sonic to the rescue fanfiction' could potentially center around Sonic characters coming together to rescue a friend or a group in trouble. It could include exciting chase scenes with Sonic's incredible speed being put to good use. There might also be some unique power - ups or abilities that the Sonics discover during their rescue mission. It could also explore the relationship between the two Sonics, whether they have different personalities or if they work in perfect harmony right away.
Some niche fanfic communities on social media platforms might also be a good place to look. For example, on Reddit, there could be dedicated subreddits where fans share and discuss 'naruto goku sonic fanfic'. However, you might need to do some digging around to find the really good ones.