Post your ideas here. Crossovers are one of my big focuses. So is episodes. I have an episode and a crossover example.
Sponges Go Green/The Army
Sponges Go Green
After watching an environmental show, SpongeBob mysteriously cares for the environment. He kicks off Patrick, he kicks off eco-careless people, and soon joins a Eco-club called 'Go Green or Go Destroy', which has a really wierd slogan!
SpongeBob receives a contract for the army, which had a signature, of which he didn't ask for. So he rejected it. However, the contracts won't stop coming back. Meanwhile, Patrick finds a four-leaf clover. Sandy also, meanwhile, find the crook who sent those contracts, Squidward!
The Portals of Passing (crossover with mainly FOP, but also with Simpsons, Danny Phantom, Jimmy Neutron and some others)
SpongeBob finds a mysterious portal in his backyard, thinking it goes to Glove World. Instead, it goes into Timmy's fishbowl, in the middle of the night. SpongeBob finds a lab ray, which Timmy and Wanda are testing. He accidentally opens lots of portals then Timmy goes to drastic measures to find SpongeBob. Meanwhile, Sandy investigates the portals, not far behind Timmy and SpongeBob.
There you go. Happy posting!