Ash's death in the first movie Is the reason he is The Chosen One.
Yes, he does not remember nor do the rest of the human and Pokémon cast of the movie. But he died and came back to life like that other chosen figure in legends. No one is The Chosen One until the Festival Maiden decides on one.
Basically, Ash was only special because Melody decided he would be. Pokémon are from outer space.
They are basically Ancient Astronauts. In the original dub Oak theorizes that life on earth came about when a lightning struck volcanic seawater, thus relating to the powers of Articuno, Zapdos and Moltres. In the original dub they are called "gods", not "titans". Remember that early episode when they meet a scientist named Simore who believed that Pokémon originated from space? Maybe Pokémon came from space and Articuno, Zapdos and Moltres created life?- In a way, doubtful. Arceus is the the first confirmed PokéGod and while he did canonically create the entire universe, he's usually said to have specifically created Earth (or whatever the planet is called) and Pokémon were his first creations. Why wouldn't he put his first creations on his first world?
The joke that had the "I have Krabbys" punchline was supposed to have been a sex joke.
Think about this for a while.