He's in Nimbasa city,after saving him you will be able to leave 2 pokemon at the daycare
route 3!
Maybe in the daycare center?
The daycare man gives you the bike
It depends on what Pokemon you have in the daycare. The Pokemon that hatches from the eggs given to you by the daycare man will be the pre-evolved form of the female Pokemon you have in the daycare.
Talk to the daycare man. If he says your pokemon like each other, then they will probably have an egg.
If you put 2 pokemon in the Day Care Centre, they will have a baby, and the DayCare Man will give you the egg.
The daycare always changes from game to game first it was on the route below cerulean city, then below goldenrod city, then to the right of verandturf town.
you go to the daycare and put in two Pokemon if they like each other they will mate and have an egg you then go to the daycare man and he will give you the egg (you could also ask they daycare man if they like each other and it takes awhile for the Pokemon to make an egg)
The Daycare in Pokemon Soulsilver version is south from Goldenrod city, which means OUT OF TOWN. So while going south you'll see a house with a man standing outside, that's the Daycare.
you go to the daycare. you put a ditto and a guy Pokemon in the daycare. eventualy the daycare man will say your Pokemon had an egg. it's a man egg!!! when it hatches it will have it's dad's moves and will be a male. don't use latios he will disappear if you do! i discovered this cheat by accident and posted the question so i could answer it.
He/she picks it randomly
pokemon make them its ovious