You can choose to be either a boy or a girl.
Breed the male one from the event, with a Ditto.
Yes, but female Tepig are rarer than males, the ratio is one in 8.
Hilda
to evolve piloswine, you have to have a heart scale and go to the move house in mistralton city, give her a heart scale and make piloswine learn ancient power and level him up once. if you don't want...