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.
Some fanfics might explore the idea of Scootaloo having a dream related to Rainbow Dash. Maybe she dreams of becoming as fast and skilled as her idol. The fanfic could then show how Rainbow Dash encourages Scootaloo to pursue her dreams, which is a very heartwarming concept.
A good fanfic in this regard often has a strong emotional connection between the two characters. It could be about how Scootaloo overcomes her insecurities with Rainbow Dash's support. This shows the power of their friendship.
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.
A good Rainbow Dash x Rarity fanfic should have a strong understanding of their personalities. Rainbow Dash is brave and athletic, while Rarity is refined and creative. The story should play on how these traits interact. For instance, in a good fanfic, Rainbow Dash might be the one to encourage Rarity to take risks in her fashion designs.
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.
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.
Friendship is also a major theme. Their relationship is explored in different ways. Sometimes it's about how they support each other during tough times. Like in some fanfics where Scootaloo gets bullied for her lack of flying ability, Rainbow Dash is there to cheer her up and encourage her.
One common theme is mentorship. Rainbow Dash can be seen as a role model for Scootaloo in many fanfics.
In this fanfic, it could also explore the relationships between the three characters in different settings. It could be set in Ponyville, where they face daily challenges together. Or perhaps they go on a journey to a far - off land, and along the way, Scootaloo learns more about herself and her new family. There could be conflicts too, like when Scootaloo has to choose between following Twilight's studious ways or Rainbow Dash's more adventurous path.
Good character development. Show how Scootaloo grows in confidence with Rainbow Dash's help. Also, an exciting plot. Maybe something that involves flying challenges or a mystery to solve. And of course, the friendship between them should be at the core, like how they support each other through tough times.