A third plot might be that an OCS in the Navy discovers a long - lost artifact at the bottom of the ocean. This artifact has some connection to Equestria's past. The OCS then has to protect it from those who would use it for evil purposes while also trying to figure out its true significance.
First, you need to develop a strong OCS. Think about their personality, their backstory, and what makes them unique. For example, if they're in the Navy, they could have a fear of water that they have to overcome. Then, create a plot that challenges your OCS. Maybe it's a mission to rescue a captured pony from an enemy ship. Make sure to include elements of the MLP FIM world, like magic and friendship. You can also add some interesting side characters to interact with your OCS.
The MLP FIM elements can be incorporated by having the characters use their magical abilities in a military context. For example, a unicorn could use its magic to help with navigation or communication during naval operations. Also, the concept of friendship from MLP FIM can be a central theme, like how the characters support each other through the tough training in Navy OCS Newport.
One idea for a plot in this fanfic could be that a new recruit in the Navy OCS in Newport is an MLP character with special powers. At first, the other recruits are skeptical or even a bit afraid of this different - looking and - acting recruit. But as time goes on, they come to realize the value of their new teammate. The story could follow their adventures during training, including things like sailing missions, combat simulations, and dealing with strict commanders. Along the way, the MLP character could teach the others about friendship and loyalty, which are important values in the MLP world.
One idea could be Rainbow Dash joining the Navy OCS (Officer Candidate School) in the MLP universe. She could face challenges like learning complex flight maneuvers specific to naval operations. Maybe she has to work with other ponies she doesn't get along with at first, but they grow to respect each other through their training.
Research is important. Even though it's a fanfic in the MLP universe, understanding how real - world Navy OCS works can add depth. You can use this knowledge to create believable training scenarios, rank structures, and protocols. For the story itself, build up the tension and drama. Rainbow Dash could face a setback, like an injury during training, and then have to work hard to overcome it and prove she still belongs in the Navy OCS.
Sammy is likely a person, perhaps a young boy or girl, who has a particular fondness for friendly zebras in the story. He or she might be the one through whose eyes we see the story unfold, having various interactions with the zebras.
I'm not sure specifically as I haven't read the exact 'sammy loves friendly zebras story'. But it might be about a character named Sammy who has a special affection for friendly zebras. Maybe Sammy meets these zebras in a zoo or in the wild and they form some kind of bond.