Spongebob is essential as the main character. Gary could be included, and perhaps in the fan fiction, Gary's meows are what lull Spongebob to sleep. Sandy could also be part of it, like she invents a new type of sleeping apparatus for Spongebob. And Mermaid Man and Barnacle Boy could make an appearance in Spongebob's dreams, where he teams up with them to fight off some sleep - stealing villains.
One idea could be exploring Spongebob's dreams in more detail. Maybe he dreams of a world where he can fly and all his friends have superpowers. Another could be a story where he has trouble falling asleep because of a noisy neighbor in Bikini Bottom, like Plankton causing a ruckus outside his pineapple. And perhaps a fan fiction where he has a sleepwalking adventure and ends up in places he's never been before in Bikini Bottom.
A frequent theme is transformation. In some fan fictions, during 'Sleepy Time', Spongebob or other characters might transform into something else. It could be as simple as turning into a different sea creature or something more complex like a hybrid of different characters. Another common theme is fear. Spongebob could have a nightmare about something he's afraid of, like a giant version of Mrs. Puff chasing him. And of course, there's the theme of humor which is always present in 'Spongebob' related fan fictions. The strange and wacky situations that happen during 'Sleepy Time' in these fan fictions are often designed to make the readers laugh.
Obviously, Spongebob himself would be a main character. And his best friend Patrick would probably be in it too.
Well, there's a fan fiction where during 'Sleepy Time', Spongebob's mind gets swapped with Squidward's. So, Spongebob is in Squidward's body and vice versa. It's really funny to see how Spongebob tries to deal with Squidward's grumpy personality while in his body, and how Squidward has to handle Spongebob's overly - enthusiastic nature. There could also be a fan fic where Patrick and Spongebob have a sleepover during 'Sleepy Time' and they end up accidentally shrinking themselves and have to find a way to grow back to normal size.
Patrick would be a great addition. His simple - mindedness can add a lot of humor, especially when paired with Spongebob and Squidward. For example, he might misunderstand their plans in the fanfic and do something completely unexpected. Mr. Krabs is also a good choice as his love for money can create interesting conflicts. If Spongebob and Squidward are involved in some sort of business deal or art project, Mr. Krabs could try to find a way to make money from it.
Well, the 'Spongebob Sleepy Time Extended Story' could potentially revolve around Spongebob's experiences during his sleep. It could include his wild dreams where he meets strange creatures or goes on crazy adventures in his subconscious. It might also show how his friends react to his sleepy behavior or if they get involved in his dreamy escapades. For example, Patrick might accidentally end up in Spongebob's dream and they have to find their way out together. Or Squidward could be annoyed by Spongebob's sleepy - time antics and try to stop him from making noise while he's asleep.
Well, in some Sleepy Time Spongebob fanfiction, there might be adventures that Spongebob has in his sleep. For example, he could be exploring strange new underwater kingdoms that only exist in his dreams. He might meet different versions of his friends there, like a super - heroic Patrick or a really smart Squidward.
An old - time medicine man could also be included. He could either be a healer who tries to cure Doc Holliday's illness or a trickster who causes more problems for him. This would introduce elements of Native American culture and mysticism to the fan fiction.
Obviously Beavis and Butthead themselves are essential. Their unique personalities and idiocy drive most of the stories. Also, Mr. Van Driessen can be a great addition. His attempts to educate them often lead to hilarious situations.
Patrick could be a great addition. His simple - mindedness could contrast with Sandy and Squidward's more complex personalities. He might accidentally cause chaos while Sandy and Squidward are trying to do something important, like a science experiment or a music recital.