One possible plot is that Sonic and Tails start in their usual world and suddenly the zombie apocalypse hits. At first, they don't believe it, but soon realize the severity. They would then have to adapt quickly. Tails could start modifying his gadgets to be more zombie - fighting friendly, like creating a sonic - based weapon using Sonic's speed. They might also encounter groups of survivors with different motives, some good and some bad, and have to decide who to trust in this new and dangerous world.
Well, it could be about Sonic and Tails trying to survive in a world overrun by zombies. Maybe they use their speed and Tails' inventions to outrun and fight the zombies. They might search for other survivors or a safe haven.
The plot could involve Sonic and Tails having to deal with zombified versions of their friends. This would add an emotional aspect as they struggle between trying to save their friends and protecting themselves. They could also discover the source of the zombie outbreak and try to stop it. For example, it could be an evil experiment gone wrong. And as they journey through this apocalyptic world, they face various challenges like finding food and shelter while constantly being chased by the undead.
Well, it could be about Sonic and Knuckles teaming up to survive in a world overrun by zombies. Maybe they use their unique abilities, like Sonic's speed and Knuckles' strength, to fight off the undead hordes.
Sonic's speed allows him to be a great scout. He can cover large areas in no time to find safe places or look for resources. His ability to spin dash can also be used as an offensive move against zombies. Tails, on the other hand, could use his two tails to fly and get a better view of the surroundings. He could also use his knowledge of mechanics to jury - rig weapons from the debris around. For instance, he might make a makeshift flamethrower using some old parts and a fuel source, which would be very effective against zombies.
Friendship is a very common theme. Tails and Sonic have a strong bond in the Sonic universe, and fanfics often explore this further, showing how they rely on each other in different situations.
Perhaps a mad scientist in the RWBY universe creates a zombie - like army. The RWBY girls and their friends find themselves in a race against time. They not only have to deal with the zombies but also the traps and defenses set up by the scientist. Weiss could use her Glyphs to create barriers against the zombies, Blake could use her speed and stealth to scout ahead, and Yang could use her strength to take on groups of zombies. Ruby, with her leadership and Crescent Rose, would lead the group through this post - apocalyptic nightmare.
Well, the plot could involve pokemon being infected with a virus that turns them into zombie - like creatures. Trainers would then have to either find a way to cure their pokemon or put them down. The world would be in chaos as the zombie pokemon spread the infection.
Sonic might adapt by using his environment in new ways. For example, he could run up walls and jump off them to avoid zombies. Knuckles could start using his knowledge of the land to find safe places. Since he knows a lot about the different zones in the Sonic world, he could lead Sonic to places that are less likely to be swarming with zombies. And both of them would have to learn to work together more closely than ever, as the threat of the zombies is much different from their usual foes.
One interesting sonic female tails x sonic fanfic could be about their adventures in a new, uncharted zone. They might discover a hidden power that only they can unlock together. In this fanfic, their friendship could be deepened as they face challenges side by side.
One possible plot could be that Sonic yells at Tails because Tails made a risky decision during a mission that almost put them both in danger. For example, Tails might have tried to take on a powerful enemy alone without waiting for Sonic's backup.
One possible plot could be Sonic, with his speed and adventurous spirit, going on a journey to spread the teachings of Jesus in a fictional world. Maybe he uses his speed to reach far - flung places and share the message of love and kindness that Jesus represents.
Good fanfics often add new elements to the Sonic universe. Maybe they introduce a new type of zone or a unique power - up. They also usually have good pacing, not too slow so that it gets boring, but not too fast that the story seems rushed. And of course, the writing should be of decent quality, with correct grammar and spelling.