A cool plot could be that Mr. Krabs discovers a new market in Royal Woods. So he sends Spongebob and Squidward there to set up a Krusty Krab branch. The Loud kids are excited about the new restaurant, but Squidward is miserable as always. Lincoln and Spongebob team up to make the new Krusty Krab a success, facing challenges like dealing with local competition and getting used to the different customers in Royal Woods.
Well, maybe there's a portal that opens up between Royal Woods and Bikini Bottom. Spongebob and Patrick come through to the Loud House world. Patrick could be really confused by all the human stuff and keep getting into funny situations like trying to eat the furniture thinking it's food. Meanwhile, Spongebob and Lincoln team up to solve a mystery that involves a missing item from both their worlds. It could be something like a special kind of jellyfish that has magical powers and it has ended up in Royal Woods.
One idea could be that Spongebob and Patrick end up in the Loud House world. They could be really confused by all the human stuff and the big family. Maybe they try to make a Krabby Patty in the Loud House kitchen but use the wrong ingredients and chaos ensues.
One possible plot could be that Casper, the friendly ghost, gets lost in Royal Woods where The Loud House is located. The Loud kids discover him and at first are scared, but then they realize he's friendly. Together, they help Casper find his way back to the Ghost World while having all sorts of wacky adventures in Royal Woods, like trying to hide Casper from their parents and getting into spooky yet funny situations at school.
Well, it could be that one of the FNAF animatronics gets sent to the Loud House world by accident. Let's say Freddy. Freddy then starts to interact with the family. He might mistake the Loud family for the pizzeria staff. Lincoln and his sisters would have to work together to either fix Freddy and send him back or find a way to co - exist with him. The younger siblings like Lily might be curious about Freddy rather than scared at first, which could add a cute element to the otherwise potentially spooky crossover.
One idea could be that the Loud sisters get recruited by WOOHP. Maybe Lincoln accidentally discovers a WOOHP gadget and the spies come to retrieve it. They notice the Loud sisters' unique skills and talents. For example, Lori's bossy nature could be useful for leading missions, and Leni's fashion sense could help with disguises. They all team up to stop a villain who is using a new technology to take over the world.
I think Lincoln and Spongebob would be an interesting pairing. Lincoln is used to living in a big, chaotic family and Spongebob is always full of energy and optimism. They could get into all sorts of misadventures together, like exploring a new part of Bikini Bottom or trying to solve a mystery in Royal Woods.
I think Lincoln and Spongebob would be an interesting pair. Lincoln is always getting into various situations in his large family, and Spongebob is constantly having adventures in Bikini Bottom. They both have a sense of curiosity and a love for exploration. They could learn a lot from each other, like Lincoln could show Spongebob about life on land and Spongebob could introduce Lincoln to the wonders of the ocean.
Well, Spongebob could visit the Loud House and get into all sorts of wacky adventures with the Loud siblings. Maybe he'd introduce them to his Bikini Bottom friends like Patrick and Sandy.
Well, perhaps the ghouls from Ghoul School are on a field trip to the human world and end up in Royal Woods. They meet the Loud family and chaos ensues at first as the Loud kids are scared. But then they realize the ghouls are friendly. Together, they have to figure out how to get the ghouls back to their school before the sun rises, which is dangerous for the ghouls. And along the way, they learn about each other's cultures and make new friends.
I think Spongebob and Lincoln would be really interesting. Spongebob's wacky optimism and Lincoln's attempts to navigate his crazy family life could create some really fun and comical situations. They could learn from each other - Spongebob about family unity from Lincoln, and Lincoln about pure joy and simple living from Spongebob.