Well, a good plot could be about a competition. There's a grand competition announced in the Candy Kingdom, and both Prince Gumball and Princess Bubblegum enter it. They start off as rivals, each determined to win. But as the competition progresses, they realize that they can achieve more by working together. So they form an alliance and end up not only winning the competition but also strengthening their bond as friends or more.
One popular story could be 'The Adventure of Bubblegum and Gumball'. In this fanfiction, they might go on a quest to save the Candy Kingdom from a new threat. It could involve their unique powers and the challenges they face together.
One idea could be a time - travel plot. Marceline accidentally sends herself and Princess Bubblegum back in time to when Ooo was first being formed. They have to work together to find a way back to their own time while also dealing with the primitive versions of their friends. Another could be a body - swap story. They wake up one day in each other's bodies and have to navigate each other's lives for a day, which leads to a lot of humorous and heartwarming moments as they understand each other better. A third plot could be a mystery where something strange is happening in the Candy Kingdom and Marceline teams up with Princess Bubblegum to solve it, and during the process, they discover hidden feelings for each other.
One plot idea could be that Gumball and Rob are forced to work together on a school project despite their differences. They start off hating each other but gradually come to understand and respect one another through the process. Another idea is that they get lost in a strange dimension together and have to rely on each other's unique skills to find their way back home. For example, Gumball's creativity and quick - thinking combined with Rob's technical knowledge could be key to their escape.
A possible plot could be that Teri accidentally gets involved in one of Gumball's crazy schemes. Maybe Gumball is trying to win a bet with Darwin and he needs Teri's help without really explaining the whole situation to her at first. Teri is hesitant but goes along with it. In the process, they have all sorts of misadventures and through that, their bond strengthens.
FanFiction.net is also a good place. There are many different categories of fanfictions, and if you dig a bit, you might come across some really interesting stories about them. However, the quality can vary, so you might need to read a few to find the gems.
The relationship can be developed through shared challenges. For example, if there's a sudden flood of chocolate in the Candy Kingdom that's endangering the lives of the gummy citizens. Prince Gumball and Princess Bubblegum have to work together to build dams and barriers. During this process, they rely on each other's strengths. Gumball might be good at coming up with quick - fix solutions, while Bubblegum is great at long - term planning. This mutual reliance can deepen their relationship.
One idea could be exploring what would happen if Gumball and his friends discovered a hidden portal to a parallel world where everything is opposite. For example, Darwin might be a land - dwelling creature instead of a fish. Another plot could involve Gumball getting superpowers overnight and having to deal with the chaos it brings, like accidentally setting off alarms or making things float when he doesn't mean to. A third idea is a time - travel plot where Gumball goes back in time and has to make sure his parents meet so that he can exist in the future.
Well, they could be part of a mystery where strange things are happening around Elmore. Gumball, with his typical comical and curious nature, teams up with Carrie. They start to investigate and find out that it's related to an ancient curse. Along the way, they learn more about each other's worlds and grow closer as friends while trying to break the curse.
One idea could be that the baby has unique powers that combine Princess Bubblegum's scientific knowledge and Marceline's vampiric abilities. For example, the baby might be able to control both candy elements and shadows. Another plot could involve the two moms trying to raise the baby in a world that doesn't fully accept their relationship, so they have to face challenges together to protect their family.
A plot could revolve around Gumball and Richard switching bodies. This would lead to all sorts of chaos and hilarity as they try to adapt to each other's lives. Gumball would have to deal with Richard's job and grown - up responsibilities while Richard would struggle with Gumball's school and social life. Through this experience, they gain a deeper understanding of each other.