>>52394561the starters are like 85% male, you breed them with something of their egg group in the ball you like (afaik it's a 50/50 to share ball?) until you get a female, then breed the female with the ditto.
pretty sure whatever breeds with ditto gives the ball too
a quick google appears to confirm this, but i could be wrong.
https://pokemondb.net/pokebase/364267/how-do-i-pass-down-pokeballs-through-breeding#:~:text=1%20Answer&text=When%20you%20breed%20a%20male,when%20breeding%20with%20a%20Ditto).