In Spongebob Squarepants crossover fanfiction, a popular concept is crossing over with "Powerpuff Girls". The girls could come to Bikini Bottom to fight some underwater villains. Another idea is a crossover with "Courage the Cowardly Dog". Courage could end up in Bikini Bottom and have to deal with the strange sea - dwelling characters. And there are fanfictions that cross Spongebob with "Futurama", where characters from the future visit the underwater world of Bikini Bottom.
One popular idea is a crossover with other Nickelodeon shows like "Avatar: The Last Airbender". Imagine Spongebob in the world of bending elements! Another is a crossover with "Teenage Mutant Ninja Turtles". They could have underwater adventures together in Bikini Bottom. Also, a crossover with "Fairly OddParents" where Cosmo and Wanda visit Bikini Bottom and cause some magical chaos.
A common idea in Spongebob Squarepants crossover fanfiction is a mash - up with "The Simpsons". Picture Homer Simpson trying to eat at the Krusty Krab or Spongebob visiting Springfield. Some fanfictions also cross it over with "My Little Pony". It's an interesting combination where the colorful ponies might interact with the sea creatures in Bikini Bottom. There are also crossovers with superhero universes like the DC or Marvel ones, with Spongebob and his friends getting superpowers.
Chapter 666, "It Really is His Mom!", is the clearest early answer because it turns Tai Fan's situation into a concrete plot event. It opens with The crowd was shocked as they turned their attention to the unknown,... and closes on Did Tai Fan just call her 'Mom' at the end?] [????.
Look to Chapter 37 for the clearest answer. It begins with The barrage was suddenly filled with hahas, but the two guests present..., keeps building through He Yun spent most of her time filming movies, had no interest in variety..., and lands on I look forward to your guidance." He Yun nodded.
Chapter 809, "Specially Made for You", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event. The chapter turns that into something concrete by moving from Listening to the cries from inside the house that sounded like a pig...
Chapter 795, "Trouble Befalls the Third Lady!", is the clearest early answer because it turns Jiang Mingchuan's situation into a concrete plot event. The chapter turns that into something concrete by moving from The group photo was spreading like wildfire on Weibo.
Chapter 789, "Son Toad", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Shang Shaojing had given her an envelope containing a piece of paper... and closes on It was guessed that he was guided by someone else, which led him to....
Chapter 753, "Final Judgment", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with In the decade she had been with Fang Wenzhe, Shu Yan never thought...
Chapter 646, "This person deserves a slap in the face!", is the clearest early answer because it turns Don's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Yan: "....." Bloody green tea, get lost!
Chapter 718, "This Person Is No Longer the Same Person", is the clearest early answer because it turns Strong Arrays's situation into a concrete plot event. Early on, Changqing noticed her amazed gaze and his eyes also shifted to the....
Chapter 794, "Debut as a Group!", is the clearest early answer because it turns Jiang Yu's situation into a concrete plot event. It opens with Everyone crowded around Shi Xu as he entered the living room. and closes on After narrowly missing out in season one, he came back in season two....
Chapter 659, "Bodyguard Agreement", is the clearest early answer because a shaky connection becomes usable in the plot. Early on, Besides, how easy is it to get into the Gu Family?. By the end, The woman who had defeated him and taken all his hopes..