For the wedding ceremony, you will need two rings and wedding outfits. Teddiuruby in Slateport sells gorgeous wedding dresses and wedding suits. To make sure that your sweetheart does not see the outfit beforehand, you will receive it in a special box. Wedding rings can either be forged by Teddiuruby or obtained as reward on this year's Valentine event.
Once you have the wedding outfit boxes and the rings, you can hand them over to the reverend of your choice and start the ceremony. Both of you will be asked to state the name of the person your heart belongs to. Your wedding vows will be seen by all guests. Both of you will receive an engraved wedding ring with both names and the date of the marriage. The name of your spouse will also be displayed on your character page once you are married. From now on, you can also wear your wedding outfit whenever you like provided you are still married.
After your marriage, you will be able to go on your honeymoon. Yandira in Celadon Beach will ship newlyweds to the honeymoon island Luname.
You can divorce your partner, even if he or she does not agree. All you have to do is find Ursaddict nearby Olivine. For an amount of cash, he will make you a free man or woman again. Your broken marriage will be symbolised by your broken wedding ring.