How do you send a mystery gift to a friend in Pokemon Diamond?

Answer 1

It has been said that all current events cannot be shared through mystery gift, only received.

Here, in a nutshell, is how events work:

A Pokemon Diamond/Pearl/Platinum save file can store 3 Mystery Gift/Wonder-card Events. Each Mystery Gift has a configuration which tells it if it is allowed to share itself with others and if so how many times this is possible. To share a mystery gift, you must have the "Mystery Gift" option on the title/main menu unlocked. To do this go to the Television station in Jublife. Go to the Second floor, head south into a little orange-floored corridor and talk to the man. He asks for two phrases. Answer thusly:

Phrase 1: Everyone Happy Phrase 2: Wi-Fi Connection

After this, he will say he shall "pull some strings" for you. Save your game and reset.

Go into your mystery gift menu. Select a card which you have downloaded from a Nintendo event with the D Pad (scrolls through all your cards with the pad).

With one card showing, press "A". It will bring up a menu, including options such as "Info". If the card is indeed sharable, it will have a "Share" option. Click the share option. Boot into wireless mode.

Have your friend or second DS/Game load up mystery gift, and pick "receive from friend".

The second DS will now also boot into wireless. Communication and event/card download is straight forward from this point. With the card downloaded, have your second DS/Game player go to any mart. A man in a green suit will be there, he will 'hand over' your mystery gift. This can only be done once per gift. Exit the mart and save. It should be plain sailing from there.