One great story could be 'The Adventure of Wheeljack and Bumblebee' where they go on a mission together to save their planet. It shows their friendship and how they rely on each other's strengths.
You can start by looking on fanfiction.net. It has a large collection of Transformers fanfictions, and there are likely quite a few focused on Wheeljack and Bumblebee. Just use the search function to find them.
Another theme is growth. It could be about Bumblebee growing in terms of his skills or confidence with the help of Wheeljack, or vice versa. They both evolve as characters in the fanfiction.
There's also 'The Unlikely Duo'. In this fanfiction, Wheeljack takes Bumblebee under his wing as a sort of mentor. It shows their interactions as Wheeljack teaches Bumblebee some advanced combat techniques. It's really interesting to see how Bumblebee grows under Wheeljack's guidance.
Bumblebee is often depicted as brave and eager. He's always ready to jump into action, despite his small size compared to some of the other Autobots. His loyalty to his friends is unwavering.
One plot idea could be that Bumblebee and Wheeljack have to team up to rescue a group of Autobots trapped by the Decepticons. They use their unique abilities, Bumblebee's speed and Wheeljack's engineering skills, to outwit the bad guys.
Friendship is a common theme. Their unique personalities often lead to an interesting friendship dynamic, like Wheeljack's adventurous nature contrasting with Ratchet's more cautious and practical side.
One key element is their different personalities. Ratchet is often the more serious and methodical one, while Wheeljack is the wild card. Their interactions based on these personalities are crucial. For example, Ratchet might scold Wheeljack for his reckless actions, but deep down he admires his courage.
Well, 'Partners in Time' is a really interesting Ratchet x Wheeljack fanfiction. It takes place in an alternate timeline and explores how their relationship might have developed differently. It has some really cool plot twists. There's also 'The Unspoken Bond' which is more of a slow - burn story. It gradually builds up the relationship between the two characters through a series of small but meaningful interactions.
Often, the theme of mutual understanding despite their differences is seen. Since they are different characters, the fanfiction might focus on how they learn to accept and love each other. Also, themes of adventure and working together on missions can be incorporated into their relationship storylines in the fanfiction.