One possible storyline could be about the challenges the zoroark faces during pregnancy, like finding a safe place to give birth. Another could be the reactions of its friends or pack members to the news.
First, do research on zoroark's characteristics and behavior in the Pokémon universe. Then, create a detailed plot that focuses on the pregnancy aspect. For example, how the zoroark's life changes during this period.
I'm not entirely sure as it's a very specific and rather unusual concept. It could potentially be a fan - made story where Naruto is somehow transformed into a Zoroark in a yaoi - themed narrative. However, without reading the actual fanfiction, it's hard to say exactly.
One common theme is the female Zoroark's relationship with other Pokémon. It could be a friendship story, like how she befriends a young Eevee. Another theme might be her adventures in the Pokémon world, exploring new areas and facing challenges.
One common theme is transformation. Ash changes in some way while wearing the Zoroark costume, not just physically but also in how he approaches challenges. Another theme is deception, as the Zoroark is known for its illusions.
One possible plot could be that Ash is in a strange, enchanted forest. He somehow gets caught in a magical spell that starts to transform him into a Zoroark. As he changes, he begins to experience the world from a Zoroark's perspective. He discovers new powers and instincts, like the ability to create illusions to protect his friends from approaching danger in the forest. His Pokémon friends are initially confused but then realize it's still Ash inside.
At first, Zoroark might see Ash as just another human who could potentially be a threat. However, if Ash saves Zoroark from a hunter's trap, that would be a turning point. Zoroark would then be curious about Ash. As they spend more time together, Zoroark would start to imitate Ash's behaviors in a playful way, which shows that it's getting closer to him. Eventually, they would develop a deep friendship where Zoroark would be very protective of Ash and Ash would consider Zoroark as one of his most special Pokemon friends.
Another place to check could be FanFiction.net. There are many different Pokémon - related fanfictions on it. Just search for 'female Zoroark' and browse through the results. However, the quality can vary, so you may need to read a few to find the ones that suit your taste.
One plot idea could be that Ash discovers a Zoroark that has been separated from its pack. He decides to help it find its way back home while facing various obstacles along the way, like other Pokemon who are territorial. Another could be that a Zoroark, in its disguised form, befriends Ash without him knowing it's a Zoroark at first. Then when he discovers the truth, they have to work together to save a forest from a group of poachers.