The characters would probably be very confused at first. For instance, Stan might look at Peter Griffin like he's some kind of alien. But then they could start to bond over things like their love for junk food.
In a crossover, the characters' interactions would be full of chaos. Cartman would likely try to manipulate some of the Family Guy characters for his own gain. He might see Stewie as a threat to his power in South Park. Meanwhile, Meg from Family Guy could find solace among the outcast characters in South Park. Peter and Kenny could also have a strange friendship. Peter might not even notice that Kenny keeps dying and coming back to life, which would add to the comical misunderstandings in the story.
It could be really wild. Maybe Peter Griffin ends up in South Park and has to deal with Cartman's schemes. They could have a big food fight in the middle of South Park with all of Family Guy's Quahog characters involved too.
Bob's Burgers could be one. It has offbeat characters and quirky storylines like Family Guy and South Park. It also offers a mix of comedy and sometimes absurd situations.
One idea could be a South Park and Adventure Time crossover. Picture Cartman trying to steal Finn's sword or Randy Marsh getting into a crazy adventure with Jake. Another could be a crossover with Rick and Morty. Maybe Mr. Garrison teams up with Rick Sanchez in some wacky interdimensional scheme. And a South Park and My Little Pony crossover would be hilarious too, with the boys having to deal with the colorful world of Equestria.
The Griffin family would likely react in different ways. Lois would probably try to be the peacemaker and make Inuyasha feel welcome. Chris might be in awe of Inuyasha's strength and cool sword. Meg could see Inuyasha as someone who doesn't fit in, just like her, and they could form an unlikely friendship. Meanwhile, Inuyasha would be constantly on guard, not fully understanding the intentions of these strange new people. He might mistake some of their jokes for real threats and react accordingly, which would lead to some very funny situations.
Well, for instance, Naruto could meet Brian the dog. Brian, being intelligent, could have deep conversations with Naruto about their different worlds and values. Naruto could share his dreams of becoming Hokage and Brian could talk about his writing aspirations. It would be an interesting exchange of ideas between a ninja and a talking dog.
In South Park, there was a strange occurrence. A new kid moved into town, but this kid was a bit different. He was a super - smart alien in disguise. The boys, being the curious bunch they are, quickly noticed something was off. Cartman thought he could use the alien to take over the world, Kyle wanted to help the alien fit in, Stan was just confused, and Kenny was along for the ride. They all got into crazy adventures as they tried to figure out the alien's true motives and protect South Park from any potential threats.
Family Guy's response was pretty witty and satirical, using its own brand of humor to address the issues raised by South Park's Cartoon Wars.
They both have a unique sense of humor, but South Park is often more controversial while Family Guy is known for its random gags.
First, know the characters well from both the South Park world and the other franchise you're crossing over with. For example, if it's a South Park and Star Wars crossover, understand how the South Park boys' personalities would interact with Jedi or Sith. Second, come up with an interesting plot. Maybe the South Park kids get transported to a galaxy far, far away. Third, add some humor. South Park is known for its irreverent humor, so keep that tone in your fanfiction.
One common theme is the culture clash. The different worlds of 'Camp Camp' and 'South Park' have their own unique cultures, and when the characters meet, there's bound to be some interesting clashes. Another theme could be friendship. Despite their differences, the characters might form unexpected friendships.