OK,for those of you who need help to catch Dialga,it's very simple.First Save.Go and
Battle Dialga.Next,use a move strong against it.If the HP of Dialga looks like it will
survive it if you used it again,use it again.If the HP is at red and not at one get a
Pokemon that has a move that isn't strong against Dialga like Normal.Until it's HP is
1,throw Ultra Balls at it.
If you are doing this at night time,throw Dusk Balls at it.Paralyzing or making it go to
Sleep can help.Good Luck!