How do you breed in pokémon white? I went in to the daycare but I could only leave one pokémon at the time?
After you reach Nimbasa City, you will be able to place two pokemon in the Day-Care.
At first, you can only put in one pokemon, but once you get to the 4th gym you get a bike and you get to put in 2 pokemon. Then normal breeding will be an option.