They could interact in a competitive way at first. Characters from Mars and Jupiter might challenge Ash to Pokemon battles to test his skills. As the story progresses, they realize they have a common goal, like protecting the Pokemon universe from a greater threat. So, they start to cooperate, with Ash's determination and the unique skills of the Mars and Jupiter characters combining to form a strong alliance.
Well, it could be about Ash traveling to Mars and Jupiter in the Pokemon world. Maybe he discovers new Pokemon species there. For example, there could be ice - type Pokemon on Jupiter because of its cold environment and fire - type Pokemon on Mars due to its hot nature. Ash could have to adapt his battle strategies to these new Pokemon and their unique abilities.
Ash, being the enthusiastic and determined trainer he is, would likely approach Roxie with great respect for her as a gym leader. He would probably be eager to learn from her about different Pokemon types and battle strategies. Roxie, on the other hand, might be initially a bit reserved but would gradually warm up to Ash's energy.
Ash is adventurous and always eager to catch new Pokemon and become a better trainer. Apple Bloom is more about learning new things in her own world. When they meet, Ash might share his Pokemon experiences with her, like telling her about different regions and the unique Pokemon there. Apple Bloom could be really curious and ask a lot of questions. She might also show Ash some of her own skills or knowledge from her world, which could be something new for Ash.
Their interaction might also involve some cultural exchange between the Pokemon and Digimon worlds. Ash could introduce Kari to Pokemon treats and how to care for Pokemon, while Kari could show Ash some of the unique digital technologies in the Digimon world. They might even exchange stories about their adventures and the friends they've made along the way, which could strengthen their bond and help them work together better.
Ash would probably be curious about the devils and angels in High School DxD. He might try to befriend them with his friendly and innocent nature. The devils and angels, on the other hand, would be intrigued by Ash's Pokemon.
Ash is very adventurous and has a strong sense of justice. Rukia is also brave and has her own moral code. Their personalities would likely mesh well as they both strive to do what's right. Ash might be a bit more impulsive, while Rukia is more calculated. So, Rukia could help rein in Ash's impulsiveness at times, and Ash could encourage Rukia to be more spontaneous.
Ash is often very enthusiastic and adventurous. Macy might be more cautious. So their interactions could start with Ash suggesting a daring plan, like exploring an old, abandoned Pokemon gym, and Macy being hesitant at first. But Ash's confidence might convince her to join in. Or Ash could be showing off his Pokemon skills to Macy, and she would be impressed and eager to learn from him.
Well, often the female characters in these fanfictions are very protective of Ash. For instance, Misty might get jealous if another girl gets too close to Ash. They also support Ash in his Pokemon battles. Like May could give him some useful advice on contests that can also be applied to battles sometimes.
Ash and Raven could interact in a more friendly way if they meet in a neutral place. Ash could show Raven his Pokeballs and explain how they work, and Raven could share some of her magic knowledge with Ash. They might even start training together, with Ash teaching Raven how to work with Pokemon in combat, and Raven teaching Ash some new combat techniques using her magic.
Ash is very determined and passionate about Pokemon. Gwen is intelligent and has a strong sense of justice. Their personalities could interact in a way that Ash's enthusiasm rubs off on Gwen when it comes to exploring the world of Pokemon. Gwen's rational thinking could also help Ash make better decisions in his Pokemon battles and adventures.