One common theme is friendship. Ash and Gengar form a strong bond in many fanfictions, like in stories where they help each other through tough battles or difficult situations.
In this kind of fanfiction, it would be a really interesting twist. Ash usually starts with Pikachu, but having Gengar as a starter would change a lot of the story dynamics. Gengar is a Ghost/Poison type, which is much different from Pikachu's Electric type. This could lead to different battle strategies and interactions with other trainers. For example, Gengar's ability to phase through walls and its spooky nature could add a whole new element to Ash's journey. Maybe he would face more challenges against trainers who are used to dealing with the typical starter Pokémon types like Fire, Water, and Grass.
Well, there are several common themes. First, there's the theme of acceptance. Ash has to accept Gengar, even though it might be a bit of an odd or scary Pokémon at first. Second, the idea of transformation. Gengar could transform Ash's view of the world of Pokémon, showing him new perspectives. And third, the theme of cooperation. They often end up working together, whether it's to defeat a powerful enemy or to achieve a common goal in the Pokémon universe. This cooperation can be both in battles and in non - battle related situations, like finding a lost Pokémon or exploring an ancient ruin.
The 'ash captures latias fanfic' probably focuses on Ash's journey in relation to Latias. Since Ash is known for his goal of catching many Pokémon, this fanfic might show how he overcomes challenges to catch Latias. It could include details like the location where he attempts the capture, which could be a new and mysterious place in the Pokémon world. Also, the fanfic might delve into Latias' characteristics and abilities, and how Ash uses his knowledge and skills to outwit it and finally catch it. There might also be elements of friendship or rivalry with other characters in the Pokémon universe that play into the story of Ash capturing Latias.
A popular one is 'Gengar's New Trainer: Ash'. This fanfiction starts with Gengar being a bit of a troublemaker but gradually warms up to Ash. The story takes them through different regions of the Pokémon world, and along the way, they learn a lot from each other. The author's description of the Pokémon battles and the interactions between Ash and Gengar are really engaging.
In some fanfictions, when Gengar gets captured by Ash, it might lead to some really interesting team dynamics. Ash could use Gengar's unique abilities in battles. For example, Gengar's ability to phase through walls could be used in creative ways during gym battles or against Team Rocket. Maybe Gengar would initially be a bit rebellious, but over time, it would grow to respect Ash as its trainer. Ash would also have to find new ways to train Gengar compared to his other Pokémon, since Gengar has different strengths and weaknesses.
There are quite a few 'Ash meets a Gengar' fanfictions out there. One type you might come across is where Gengar plays pranks on Ash and his friends, leading to some comical situations. Another could be a more serious take, like Gengar being a key to solving a mystery in the Pokémon world that Ash gets involved in. It really depends on the creativity of the authors.
In a fanfic where Ash betrays and captures Arceus, it could be a very dark and unexpected turn. Maybe Ash has been influenced by some powerful and malevolent force. This would completely change his character archetype from the heroic trainer we know. It could lead to a lot of chaos in the Pokémon world as Arceus is like a god in that universe.
One possible plotline could be that Ash captures Suicune in an unexpected way, like during a special event in a new region. Then he has to deal with the consequences of having such a powerful and rare Pokémon, like other trainers being jealous or wanting to challenge him for it.
Well, Ash might first encounter the Houndour in a dangerous situation, like it being chased by a stronger Pokémon. He could then decide to rescue it and in the process, gain its trust and capture it. Maybe he uses one of his Pokémon to battle and weaken the Houndour first before throwing a Pokéball.