When Ash Ketchum was 6 he was playing with Pokémon in the woods, until a Salamence attacked him, luckily, MeaTwo saved him, but Ash suffered some brain’s damage, making Ash lost his memories and the ability to walk, but MewTwo takes him to his palace, and take care of Ash like his son, and giving him a Shynx. Ash love MewTwo like his father, and MewTwo is overprotective with the 10 years old boy, and he spoils him, cause Ash is the only creature he learned to love.