The plot could revolve around a mysterious artifact. Sonic X and Wonder Girl both hear rumors about a powerful artifact that has the potential to either save or destroy their respective worlds. They independently start searching for it. Their paths cross and at first, there's some tension as they don't trust each other. However, as they learn more about the artifact and the real threat behind it (a group of interdimensional thieves), they start to work together. Sonic's agility helps them navigate through dangerous terrains and Wonder Girl's lasso and super strength come in handy when dealing with the thieves. In the end, they decide to safeguard the artifact in a neutral dimension.
A possible plot could be that a powerful villain creates a device that sucks Sonic from his world into Wonder Girl's. Sonic is disoriented at first but quickly realizes he needs to find a way back. Wonder Girl discovers him and at first mistakes him for a threat. But when they both notice the strange things happening around them, like the sudden appearance of dark energy blasts, they figure out it's the work of the same villain. They then join forces, with Sonic using his speed to scout and Wonder Girl using her combat abilities to fight. Eventually, they manage to defeat the villain and Sonic finds his way back home, but not before they promise to be friends and help each other if such a situation arises again.
One idea could be that Sonic accidentally gets transported to the world of Wonder Girl. He teams up with her to stop a common enemy that is threatening both their worlds. Maybe an evil scientist who wants to steal Sonic's speed and Wonder Girl's powers.
One idea could be that Sonic accidentally runs into the world where Wonder Girl exists. He's confused at first but then realizes he can use his speed to help her in a battle against some powerful villains. Maybe he could use his speed to create distractions while Wonder Girl delivers her powerful blows.
Perhaps Sonic as a girl could have a story where she is trying to prove herself in a male - dominated racing circuit. She has to overcome doubts from others and show that she is just as fast and skilled as any of the male competitors. Along the way, she makes new friends who support her journey.
One possible plot could be that the characters from Sonic Underground get transported to the world of Sonic X. They then team up with Sonic and his friends in Sonic X to fight a common enemy like Dr. Eggman who has somehow become even more powerful by combining technologies from both universes. The different Sonic characters would have to learn to work together, sharing their unique abilities and skills.
One possible plot could be that an ancient evil threatens both the Sonic X universe and the Sonic Boom universe simultaneously. Sonic from Sonic X and Sonic from Sonic Boom have to team up, along with their respective friends. They could start by accidentally crossing into each other's worlds through some sort of interdimensional rift. At first, they might be a bit confused and even a little competitive, but as they realize the scale of the threat, they combine their unique skills. Sonic X's Sonic is more used to high - tech environments and has different power - ups, while Sonic Boom's Sonic is more in tune with his natural island surroundings. Together, they could battle the evil and in the process, learn a lot from each other and their friends, ultimately saving both universes.
One possible plot could be that Sonic, after being exposed to a strange Chaos Emerald malfunction, turns into a girl. As a girl, Sonic might face new challenges in terms of her identity. For example, her friends like Tails and Knuckles might initially be confused. Sonic could then have to deal with different reactions from her enemies too. Maybe Dr. Eggman would underestimate her in this new form, but she would prove him wrong by using her speed and skills in new and unexpected ways. She might also discover new aspects of her own personality that were hidden before the transformation.
The story could revolve around how the other characters in Sonic's world react to Chris's death. Tails might try to comfort Sonic while also being deeply affected himself. Knuckles could be more stoic on the outside but also feel the impact. And the story might show how they all come together to remember Chris and keep his spirit alive in their world.
One possible plot could be that Sonic accidentally gets transported to the Arthurian era where he meets Sir Lancelot. Lancelot is initially suspicious of this strange, fast - moving creature but soon realizes Sonic's good heart. They then team up to fight some common enemy that threatens both Sonic's world and Camelot, like an evil wizard who wants to steal the Chaos Emeralds and the Holy Grail.
Perhaps the fanfiction could center around a race. Sonic, of course, loves to race. Cream wants to prove herself as a fast runner too. Bokkun, seeing an opportunity for chaos, creates some obstacles during the race. But in the end, it leads to Cream and Sonic working together to overcome Bokkun's pranks and they all learn a valuable lesson about friendship and sportsmanship.
In this 'sonic x planet of misfortune fanfiction', Sonic could be separated from his friends upon arriving at the planet. He then has to endure a series of misfortunes all by himself. But as he overcomes each obstacle, he becomes stronger. Eventually, he reunites with his friends and they all find a way to leave the planet.