Who are the most popular characters to include in Spongebob and Squidward fanfiction besides them?

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.

Captain America is often a popular choice. He has a long history with both Black Widow and Winter Soldier, and his moral compass can add an interesting dynamic to the story.

Mr. Krabs would surely be a main character. After all, he's the one who fires Squidward. He might be portrayed as the bad guy in the story, or perhaps there could be some backstory that makes his decision seem more understandable.

Hermione is a very popular choice. Her intelligence and strong will can create interesting dynamics with Draco. Harry could also be included, as his rivalry with Draco is well - known. And then there's Ginny. Her fiery personality can add a lot of spice to the story when interacting with Draco.

Metro Man could be a great addition. His presence could add some tension or an interesting dynamic, especially considering his past relationship with Megamind. Minion, Megamind's loyal sidekick, is also a must - include. He could provide comic relief and his unique perspective on Megamind and Roxanne's relationship. And maybe the Warden, who could be involved in some sort of prison - related subplot or just add to the overall chaos in the story.

Sasuke could be a great addition. He might initially be skeptical of Naruko's newfound bond with the Kyuubi, but then come to see the potential in it. Kakashi could also be included as he has a lot of knowledge and experience. He could offer guidance to Naruko on how to handle the Kyuubi's power. Another good character would be Jiraiya. He could have some interesting insights into the relationship between Naruko and the Kyuubi, having known about the Kyuubi for a long time.

The King and Queen of the kingdom. Their presence can bring in the political and parental aspects. They might have different views on how Rapunzel and Cassandra should handle certain situations, which could create more conflict and plot twists.

Sakura could be an important character. In a Fem Sasuke and Naruto fanfiction, Sakura might be jealous of the relationship between Fem Sasuke and Naruto at first, but then she could grow to accept it and even become a good friend to Fem Sasuke. Kakashi is also a great addition. He could be the one to mentor Fem Sasuke and Naruto, teaching them new jutsus and guiding them on their ninja paths. Another character could be Gaara. He might be an ally or an opponent in the story. If he's an ally, he could team up with Fem Sasuke and Naruto to fight a common enemy. If he's an opponent, it would add an interesting dynamic to the story as they have to face off against his powerful sand abilities.

Crow Hogan is often a popular character to include. He's Yusei's friend and his presence can add more depth to the story. Another one could be Jack Atlas. His rivalry with Yusei and his strong personality make him a great addition. Also, Akiza Izinski might be included as she has her own powers and a connection to Yusei.

Princess Peach is often included. She can add a romantic element to the story, like if Bowser is still trying to win her over or if she has some role in mediating between Mario and Bowser. Another popular character is Luigi. He can be Mario's sidekick as usual, or he could have his own sub - plot where he tries to outdo Mario in dealing with Bowser.