In some fanfictions, Happy gets involved in a prank war within the Fairy Tail guild. For example, he might team up with Lucy to play a prank on Gray. They could use his stripping habit against him by making his clothes disappear in a really embarrassing situation, like in the middle of a speech in front of the whole guild. This creates a really humorous and chaotic scene full of laughter.
One of the funniest scenarios could be when Happy tries to 'help' Natsu cook but just ends up making a huge mess. He might accidentally add too much of an ingredient or knock over pots while flying around the kitchen in excitement.
There's a fanfiction called 'Happy and the Lost Treasure'. In this story, Happy teams up with some unlikely allies in search of a legendary treasure. It has a lot of humor as Happy's antics keep the other characters on their toes. The story also has some really cool action scenes where Happy uses his flying skills to outmaneuver enemies.
One interesting fanfiction could be where Happy and Carla go on a secret adventure without the rest of the guild. They discover a hidden magical place and have to use their unique skills to get back home.
Happy's simple - mindedness often leads to humorous situations. He might misunderstand a complex plan in the guild and go off on his own tangent, creating chaos. For example, if the guild is planning a surprise party for someone and Happy misinterprets the instructions, he could end up ruining the surprise in a really comical way.
One idea could be that Happy's death shatters the Fairy Tail guild. Natsu, being his closest friend, goes into a deep depression. The guild loses its usual cheer and the members struggle to come to terms with the loss. They might hold a grand memorial for Happy, and throughout the fanfiction, it could show how each character copes in their own way, like Lucy writing in her diary about all the memories she had with Happy.
Archive of Our Own (AO3) is also a great place to look for 'Fairy Tail Happy' fanfictions. It has a well - organized tagging system. So, if you search for the 'Fairy Tail' tag and then narrow it down to stories involving Happy, you'll be able to find some really good ones. There are often high - quality stories there with unique takes on Happy's character.
There can be all sorts of 'what if' scenarios. Maybe what if Natsu never joined Fairy Tail? Or what if Lucy had a different kind of magic?
For Natsu, it would be devastating. Happy has been his constant companion since they were young. Natsu would likely be filled with rage and grief, which could potentially lead him to seek revenge against whoever or whatever caused Happy's death.
In some fanfiction, a human who is an artist finds a fairy tail. The fairy in the tail has the power to bring art to life. The human and the fairy work together to create a beautiful, magical art gallery. They invite other humans and fairies to see their creations, spreading happiness and harmony between the two worlds.
Some fanfictions also feature Happy and Charle teaming up to solve a mystery within the Fairy Tail guild. For example, they could be investigating strange disappearances of guild members. They use their unique abilities, Happy's flight and Charle's foresight, to piece together the clues and get to the bottom of the mystery.
One interesting idea could be exploring Happy's final moments in a very emotional way. Maybe it shows his selfless acts even in the face of death.