The lemon element could represent something new and challenging for Rainbow Dash. For instance, if she has an aversion to the smell of lemons at first, she could learn to overcome it as she faces different situations in the fanfiction. This would show her growth in dealing with things she doesn't initially like.
In a fanfiction, Rainbow Dash's brother could be an outcast among the ponies. He doesn't have the same level of confidence as Rainbow Dash and struggles to find his place. However, through a series of adventures and with the help of Rainbow Dash and her friends, he learns to embrace his own strengths and differences, and eventually becomes a respected member of the pony community.
Another scenario in a fanfiction could be that Rainbow Dash contracts a mysterious illness that no pony can cure. As she gets weaker, the ponies around her try their best to help. But in the end, she succumbs to the illness. Her death would cause the ponies to come together to find ways to prevent such a tragedy from happening again, perhaps leading to new medical discoveries in Equestria.
A plot could involve Rainbow Dash finding a lemon - themed magic item. This item has the power to make things around her turn yellow and smell like lemons. She has to learn how to control this new power while also dealing with her friends' reactions. For example, some of her friends might be curious, while others could be a bit scared at first.
One great fanfic could be about Rainbow Dash taking Scootaloo on a special flying adventure. It might include Rainbow Dash teaching Scootaloo new flying techniques. This would strengthen their bond and show how much Scootaloo looks up to Rainbow Dash.
He could be a prodigy in a different area than Rainbow Dash. For instance, while she is great at flying stunts, he could be a master at creating flying devices. The plot could revolve around him creating a new type of flying machine that gets stolen by an evil force in Equestria, and Rainbow Dash and her friends have to help him get it back.
One popular Rainbow Dash fanfiction is 'Flight School Days'. It focuses on Rainbow Dash's early days at flight school, her struggles and how she overcame them. Another is 'Rainbow Dash and the Great Race' where she participates in an epic race across Equestria.
You can find Rainbow Dash My Little Pony fanfiction on websites like Fimfiction.net. It has a large collection of fan - created stories related to My Little Pony, including many focused on Rainbow Dash.
A popular fanfic in this pairing is 'The Bond Between Colors'. In this, their friendship blossoms into something more special. It delves into how they face challenges together in Ponyville. For example, when there's a problem with the local fashion show and Rainbow Dash uses her speed to help Rarity get all the materials she needs in time. It's a really heartwarming read.
One interesting Rainbow Dash fanfiction could be about her training a new group of pegasi in the ways of speed and agility. It might show her strict but fair coaching style.