One idea could be a story where a young trainer's Pikachu discovers a new way to use Bulk Up that gives it an edge in battles. Maybe it combines it with an electric attack in a unique way.
In fanfiction, Machoke's Bulk Up might be described as a visually stunning move. The muscles might bulge and a sort of energy aura could surround it. This can add to the dramatic effect of battles in the story.
Well, in a fanfiction, the Machop could be part of a team that's not doing so well in battles. So, it decides to focus on Bulk Up. As it trains and uses this move more and more, it not only gets physically stronger but also becomes a sort of inspiration for the rest of the team. The story could detail its journey from being a relatively weak member to a key player through the use of Bulk Up.
One interesting aspect in fanfiction could be how Machoke's Bulk Up affects its relationship with its trainer. Does the trainer encourage it more because of this powerful move? Or does it lead to overconfidence in Machoke? For example, the trainer might worry that Machoke becomes too aggressive with its increased strength from Bulk Up.
You can also start by creating a unique setting. Say, a secret training ground where Pokemon can learn and perfect the Bulk Up move. Describe how this place looks and feels, and then introduce the characters that will be involved in the fanfiction. It could be a group of young trainers eager to make their Pokemon stronger using Bulk Up.
One idea could be a hybrid of Pikachu and Eevee. This hybrid could have the cute appearance of both, with Pikachu's lightning - based powers combined with Eevee's ability to evolve into different forms. It could be a central character in a story where it's trying to find its place in the Pokemon world, being different from the normal Pokemon.
One idea could be the main character being reborn as a Pikachu and having to navigate the world with its electric powers while making friends with other pokemon. Another could be being reborn as a Eevee and having the unique ability to evolve into any form at will, which causes both envy and admiration among other pokemon. Maybe the reborn pokemon has memories of being a human and uses that knowledge to outwit trainers and other threats.
One idea could be to create an OC that has a unique typing combination not commonly seen, like a Ghost/Grass type. This could lead to interesting storylines in the fanfiction, such as how they interact with other Pokemon and trainers. Another idea is to give the OC a special ability that sets them apart. For example, an ability that allows it to communicate with wild Pokemon more effectively, which could be useful in various fanfiction scenarios.
For a Pokemon x Pokemon hybrid fanfiction, you could consider a Bulbasaur and Vulpix hybrid. It would have the plant - based abilities of Bulbasaur like photosynthesis and the fire - based powers of Vulpix. It could use the fire to protect its plants or use the plants to create a unique defense against other fire - types. Also, a hybrid of Jigglypuff and Meowth could be really fun. It might have Jigglypuff's singing ability to put others to sleep and Meowth's thieving skills, which could lead to some really comical and interesting plotlines.
One idea could be that Melody gets tied up by a group of rogue Pokemon trainers who mistake her for someone else. They realize their mistake later and have to figure out how to make it up to her. Another could be that in a strange Pokemon mystery, Melody is tied up as part of a trap set by an unknown Pokemon, and the other Pokemon characters have to rescue her. A third idea is that it's part of a game or challenge among friends in the Pokemon world where things go wrong and Melody ends up tied up accidentally.
One idea could be a story where a Pokemon with a special musical ability is discovered in a hidden forest. The Pokemon's melody has the power to heal other Pokemon. A young trainer then sets out on a journey to protect this Pokemon from those who would misuse its power.