A few minutes. Not too long.
But I recommend you to do it yourself; no, not because I'm lazy. Because you'll have a little more experience on those kinda things and you probably be able to RNG Pokemon, making breeding easy and stuff.
start a new game and save it perhaps or choose the new game option and lol fail stats for my first ho-oh i was kinda excited cause i got bold on my first try lol
21/29/20/18/8/8