Well, one way is through shared dreams. Mewtwo could enter Ash's dreams and they could communicate on a deeper level there. This would be a very unique way to develop their relationship as it's not a typical form of interaction. Ash could learn more about Mewtwo's fears and hopes in these dream encounters.
One interesting storyline could be Ash befriending Mewtwo in a more in - depth way. Maybe Ash helps Mewtwo understand the true meaning of friendship among humans and Pokemon. He could show Mewtwo that not all humans are bad by introducing him to his friends like Brock and Misty, and how they all care for their Pokemon.
In a Pokemon fanfiction with Ash and Mewtwo, it could start with Ash encountering Mewtwo in an unexpected place. Maybe in a hidden forest where Mewtwo is observing the wild Pokemon. Ash, being his curious self, tries to approach Mewtwo. Mewtwo, initially hostile, realizes Ash's pure intentions and they start an unlikely friendship. This could lead to many adventures where Ash and Mewtwo face various challenges together, like battling against a new, powerful and evil Pokemon organization.
The relationship can develop through shared experiences. For example, if they get trapped in a strange dimension together. They'll have to rely on each other to find a way out. This mutual dependence can lead to a stronger bond.
One possible scenario in this fanfiction could be that Ash encounters Mewtwo in a new, uncharted region. Mewtwo, being intrigued by Ash's unwavering spirit, decides to test him. Ash passes the tests with the help of his Pikachu and other Pokemon. This leads to Mewtwo seeing Ash as a worthy trainer and allowing itself to be caught. It would be a great twist on the usual Pokemon-catching storylines.
Typically, they often focus on the contrast between Ash's warm - hearted nature and Mewtwo's more complex and often aloof personality. Their relationship is usually at the center, exploring how they come to understand and care for each other.
Well, Ash is known for his adventurous and curious nature. In Mewtwo's body, that adventurous spirit might be redirected. Instead of running around exploring physically, he might use Mewtwo's psychic powers to explore the minds of other Pokemon or discover hidden places in the psychic realm. His personality would also become more complex as he'd have to deal with Mewtwo's memories and emotions. He'd still be the same Ash at heart, but there would be an added layer of depth and thoughtfulness, perhaps a bit of melancholy too as he'd understand Mewtwo's pain of being created for the wrong reasons. And his interactions with other Pokemon and humans would be different. He might seem more intimidating at first because of Mewtwo's appearance, but as soon as he started to communicate, his friendly and helpful Ash - like personality would show through.
The relationship could be developed through shared dreams. Maybe Mewtwo has the ability to enter Ash's dreams, and in these dreams, they have adventures together that are different from their real - world experiences. This would create a very special and unique bond between them.
In an 'Ash into Mewtwo' fanfic, one aspect could be the change in relationships. His Pokémon might not recognize him at first, and he'd have to find a way to communicate and regain their trust. Also, trainers like Misty and Brock would be shocked. The fanfic could delve into how Ash tries to convince them that he's still the same person inside, just in a different form.
A 'pokemon mewtwo and missingno fanfic' could potentially tell a story where Mewtwo, the powerful and genetically - engineered Pokemon, crosses paths with Missingno, the infamous glitch Pokemon. It might be a story of how Mewtwo tries to understand or control Missingno, or perhaps they team up against a common enemy. There could be a lot of creative elements in such a fanfic, like new abilities for the Pokemon or a whole new world created just for them.