Well, obviously the main characters would be the Powerpuff Girls - Blossom, Bubbles, and Buttercup. And Sonic the Hedgehog would also be a central character. There could also be other characters from both universes like Professor Utonium from the Powerpuff Girls side and Tails or Knuckles from Sonic's side depending on the direction of the fanfic.
One idea could be a crossover where the Powerpuff Girls and Sonic team up to fight a common enemy like Dr. Eggman and Mojo Jojo who have joined forces. They could combine their powers and speed to outwit the villains.
Maybe there's a device that combines the chaos emeralds' power with Chemical X. This causes a strange rift in the dimensions, bringing Sonic and the Powerpuff Girls together. They have to work together to reverse the effects of this strange combination. Sonic uses his speed to gather the scattered chaos emeralds, and the Powerpuff Girls use their powers to keep the villains from interfering.
Another theme is the clash of different worlds. The Powerpuff Girls come from a more urban, human - like world, while Sonic is from a world full of anthropomorphic animals. Fanfictions often play with how these two different settings interact. This can lead to humorous situations as the characters adjust to the new surroundings.
Sonic would be really interesting. His super - speed and adventurous nature would contrast well with the Powerpuff Girls' more home - based superheroics in Townsville. His encounters with the villains in Townsville would be full of action as he zooms around trying to stop their evil plans, all while trying to figure out how to get back to his own world.
No. The Powerpuff Girls are known for their heroic deeds and strong characters. Fanfic that involves diapers in relation to them is inappropriate as it distorts their intended image.
One great piece of Powerpuff Girls Sonic fanfiction is 'The Sonic - Powerpuff Girls Crossover Adventure'. It combines the energetic and heroic nature of the Powerpuff Girls with Sonic's super - speed and cool attitude. The story has them teaming up to save both Mobius and Townsville from a common enemy. It's full of action - packed scenes and interesting character interactions.
One idea for a fanfic could be that Dexter creates a device that accidentally merges the worlds of Powerpuff Girls Z and his own. The Powerpuff Girls Z then have to deal with Dexter's crazy inventions while Dexter has to adapt to the super - powered world of the girls. Maybe they team up to fight a common enemy that is a result of the accidental merge.
One idea could be a fanfic where the Powerpuff Girls go on a space adventure. They could encounter new alien species and have to use their powers in unique ways to survive in the outer space environment.