One idea could be exploring the unique bond between the pregnant Pokemon and its trainer during this special time. The trainer might have to adjust their training methods and care routine to ensure the Pokemon's health and the well - being of the upcoming baby Pokemon.
Perhaps a plot where different Pokemon species interact during the pregnancy and breeding process. For example, a water - type Pokemon might need a specific environment that a fire - type Pokemon could help create in an unexpected way, leading to a story of cooperation and friendship.
A story could focus on the challenges a pregnant Pokemon faces in the wild. It might have to find a safe place to give birth while avoiding predators. Meanwhile, other Pokemon in the area could either be a threat or come to its aid, creating a complex and engaging story.