There could be a new character, a rival to Ash's dad from his younger days when he was an active Pokemon trainer. This rival could reappear in the fanfiction, causing some trouble or adding some drama to the story.
Perhaps when Ash meets his dad, his dad is on a very important mission. Ash decides to join him, and during this journey, they face many challenges together. His dad could teach Ash some new battle strategies that are different from what he has learned before. They might also encounter some rare and powerful Pokémon that they have to work together to either capture or overcome. This meeting could be a turning point in Ash's Pokémon - training journey, making him more mature and experienced.
They could develop a mentor - student relationship. His dad, being more experienced, could teach Ash advanced Pokémon training techniques. Ash, in turn, could show his dad his unique way of bonding with Pokémon, which his dad might not have seen before, thus deepening their connection.
One possible scenario could be that Ash meets his dad in a Pokémon tournament. His dad could be a renowned trainer there. Ash would be shocked at first but then feel a sense of pride and excitement to compete against or with his father.
The most exciting part could be when Pikachu uses its most powerful move, like Volt Tackle, against one of Ash's really strong Pokemon like Greninja. The clash of their attacks, with Pikachu all charged up and Greninja ready with its Water Shuriken or some other powerful move, would be intense. The build - up to this moment, with both Pokemon sizing each other up and the anticipation of which move will land first, would be really thrilling.
The relationship can be developed through shared experiences. For example, they could go on a fishing trip together. While on the trip, they would have time to talk, share jokes, and Ash could pass on some of his wisdom to his daughter. This would strengthen their bond and she would likely say 'love you, dad' more often as they grow closer.
The funniest part could be when Adrien makes a really cheesy cat pun that catches his dad off - guard. For example, if he says 'Dad, this cat is so cool, it's the cat's meow!' and his dad just bursts out laughing at how corny it is.
It's a graphic novel that features a battle between Freddy Krueger, Jason Voorhees, and Ash. It combines the horror elements from the Freddy and Jason franchises with the unique character of Ash, likely filled with lots of gory and spooky scenes.
His Pokémon would probably be very confused at first. Pikachu, for example, might try to zap Ash back to his senses if he starts acting like a Team Rocket member. They would likely sense that something is wrong with Ash and would do their best to get him away from Team Rocket's influence.