Well, in such a fanfiction, the character could face the challenge of having different goals from Ash. Ash is mainly focused on becoming a Pokémon master, but the character might have other interests, like researching Pokémon habitats or evolving Pokémon in new ways. Trying to pursue these goals while also being part of Ash's journey can be difficult. Additionally, they might face challenges from Pokémon themselves. Some Pokémon might be more attracted to Ash because of his aura or style, and the character has to find ways to form their own bonds with Pokémon. There could also be family - related challenges, like dealing with their parents' expectations which might be more centered around Ash.
One challenge could be living in Ash's shadow. Since Ash is so well - known in the Pokémon world, it might be hard for the character to be recognized for their own achievements. Another challenge could be dealing with Ash's impulsive nature. If the character is more cautious, they might constantly have to balance Ash's eagerness to jump into things. Also, they might face challenges from other trainers who assume they are just like Ash or are trying to use them to get to Ash.
One challenge would be dealing with Spike's reputation. If other characters know Spike well, they might expect the reborn human in Spike's body to act in a certain way. The reborn human would have to constantly prove that they are different. Another challenge could be the physical cravings of a vampire. Since they have a human soul, they might struggle more with the urge to drink blood.
One challenge could be distance. Since Ash is often on his journey traveling from region to region, being away from Alola Lily for long periods might put a strain on their relationship. For example, he might miss important events in her life or she might feel lonely without him.
One challenge could be that Larvitar might be very stubborn at first. It's a strong - willed Pokémon, and it might not want to follow Ash's commands right away. Another challenge could be that Larvitar might be targeted by other trainers or Pokémon hunters because it's a relatively rare Pokémon. Ash would have to protect it.
One challenge could be wild Pokémon that guard the berry patches. They might not want Ash to take their food source. Another is that some berries may be in hard - to - reach places, like on top of cliffs or deep in thickets.
Another challenge could be jealousy. Ash has many friends in the Pokémon world, and Trip might feel a bit left out or jealous if Ash keeps talking about his other friends. Also, if they meet other trainers who are interested in either Ash or Trip, it could create some tension.
One challenge could be Ash's constant Pokemon journey. He is always on the move, traveling to different regions. This would make it hard to have a stable relationship as he might not be able to spend much time with his secret girlfriend.
One challenge could be taming the Giant Dragonite. Since it's so large and powerful, it might not be easy for Ash to get it to follow his commands right away. Another challenge might be dealing with other trainers or Pokémon who are intimidated by the Dragonite's presence and see it as a threat.
They could face a powerful new villain who has a team of super - strong Pokemon.
Hermione would also face the challenge of secrecy. If the wrong people found out, it could put her in danger. And she might have to constantly lie to her friends and family, which would be really hard for someone as honest as her. In some fanfictions, this internal struggle is really well - explored.
Societal and family pressures could be another big challenge. Their families might have different expectations about how they should raise the child. And in the public eye, there could be a lot of speculation and judgment, which can be difficult to handle during such a personal and vulnerable time like pregnancy.