It can start with a conflict. For example, King Sombra might be causing trouble for Shining Armor's kingdom. But then, through a series of events like a shared quest or a mutual acquaintance's intervention, they start to see each other in a different light.
One idea could be a story where King Sombra and Shining Armor have to team up against a common enemy that threatens both their kingdoms. They start off as reluctant allies but gradually come to respect each other's skills and strengths.
Their relationship could develop through shared goals. For example, if there is a magical imbalance in Equestria that only their combined magic can fix. As they work towards this goal, they start to understand each other better.
Through challenges. Suppose the baby gets sick. Their reactions to this situation, like how Shining Armor tries to find the best doctors and Cadence stays by the baby's side constantly, can strengthen their family bond in the fanfic.
In fanfiction, they could also be brought together by a third party. Maybe a young changeling who wants peace between the two races tricks them into meeting in a neutral place. At first, they are both angry but as they talk more, they start to see the possibility of cooperation. This could be the start of a complex relationship where they learn to respect each other's differences.
One great Spike x Shining Armor fanfic is 'A Bond Beyond Expectations'. It delves into their relationship in a very unique way, showing how they could support each other in different scenarios. It has a really engaging plot that keeps you reading.
I really enjoy Chrysalis and Shining Armor fanfics. They often explore unique relationships and scenarios. Some fanfics might focus on Chrysalis' complex character and how she could interact with Shining Armor in different ways, like in a world where she tries to reform. It's fascinating to see how authors play with their personalities.
The relationship could start with hostility. King Sombra being the dark entity he is, would see Twilight as a threat. But as Twilight tries to understand his motives, she could start to chip away at his cold exterior. For example, by showing him acts of kindness and mercy that he may not have experienced before.
Another theme might be mentorship. Shining Armor could be seen as a mentor to Spike, guiding him in different aspects like magic or life skills. And also, adventure is a possible theme. They might go on adventures together, facing different foes and obstacles.
Sorry, I don't have a specific 'shining armor x spike fanfic' to recommend directly. You can try searching on some popular fanfic platforms like FanFiction.net or Archive of Our Own. There might be a variety of stories there related to this pairing.
Often, these types of fanfics can be a great way to expand on the characters. They might show a different side of Shining Armor, perhaps a more vulnerable side when it comes to protecting his family. And Cadence could be shown as not just a princess of love, but also a strong leader. The fanfic could also explore their friendships with other ponies in Equestria.