I have put a lvl 16 male Lucario and a lvl 23 Ditto in the day care in pokemon Platinum. I have walked around for half an hour and i havent got an egg yet! The day care man says they doesnt seem to like each other much. What should I do?
Just keep walking. If it says they don't really like each other it's harder to get an egg because the percent is Lower. You'll get it eventually though.
you have to switch onto your daycare app and click on it. once you see an egg talk to the man outside the day care and hell give you a riolu egg.