Obviously, Phione would be one of the main characters. It could also have a trainer as a main character, someone who is deeply concerned about Phione's well - being and is determined to help it out of the nightmare. Maybe there could be a wise old Pokemon, like an Alakazam, that has some knowledge about the nightmare realm and helps guide them through it.
Well, it could be about a Phione trapped in a nightmare world. Maybe it's lost in a dark and distorted version of its own ocean habitat. The plot might involve it trying to find a way out while facing various nightmarish creatures or challenges that are different from the normal Pokémon threats.
Perhaps an experienced trainer who has seen the Pokémon world before the undead invasion and is now using their knowledge to lead the fight. And their most trusted Pokémon, like a Pikachu or a Charizard, could also be main characters. There might also be a mysterious character who seems to have some connection to the origin of the undead problem, either as a potential ally or an enemy.
One possible plot could be that Phione, being a rare and unique Pokemon, is being hunted by an evil team. Ditto, with its ability to transform, disguises itself as Phione to draw the hunters away. Along the way, Ditto discovers more about Phione's true nature and the importance of protecting it. This could lead to a friendship between the two Pokemon that helps them overcome the challenges.
Their interaction could be very interesting. Phione, being a gentle and somewhat mysterious Pokemon, might be initially cautious around Ditto. Ditto, on the other hand, being curious, might keep transforming into different things to amuse Phione. For example, Ditto could transform into other sea - based Pokemon that Phione is familiar with to make it feel more at ease.
Another possible main character could be a new student at Hogwarts who has a special talent for cooking. This student could be from a family of muggles who owned a restaurant. They bring their non - magical cooking knowledge combined with magic to try and turn the kitchen nightmare around. They would interact with the well - known Harry Potter characters and together they would work on solving the kitchen issues.
Maybe an older priest who has a long - time companion Pokemon, like a Growlithe. He uses his experience with both the church and Pokemon to guide the younger members of the congregation, especially those who are also trainers. He helps them see how their Pokemon can be a part of their faith and not just for battling or collecting.
The main character could be a young trainer named Ash. He's always eager to learn more about Pokemon and is very friendly. Another character could be Misty, a girl who is really good with water - type Pokemon and is a bit of a tomboy. There could also be Brock, who is knowledgeable about Pokemon care and often gives advice to other students.
A young trainer from an underdog region who rises to be a leader in the war effort. He or she could have a unique bond with a Pokemon that gives them an edge in battles.
Another possibility for main characters could be Rainbow Dash from MLP and Blastoise from Pokemon. Rainbow Dash is brave and loves adventures, which would be perfect for exploring the new Pokemon world. Blastoise is strong and reliable. They could form a great team, with Rainbow Dash using her speed to scout ahead and Blastoise using its water attacks to protect them from danger.
It could be an experienced trainer who has a team of fully - evolved Pokemon. This trainer might be taking a break from their usual battles and just wants to relax at the beach with their Pokemon pals. Maybe they have a Charizard that enjoys sunbathing on the warm sand.