Things You'll Need
Instructions
Activate the Mystery Gift function. In Diamond, Pearl, and Platinum, go to the second floor of the Jubilife TV Center in Jubilife City, Sinnoh. There iw a man there who accepts sayings from you. Tell him the following: "EVERYONE HAPPY" and "WI-FI CONNECTION." This will activate the Mystery Gift function. In HeartGold and SoulSilver the Mystery Gift function is available after you receive the Pokedex.
Connect to another Pokemon Diamond, Pearl, Platinum, HeartGold or SoulSilver player. Nintendo DS players can connect to each other using the built-in wireless option.
Select the "Check Card" option on the Mystery Gift menu. This will display all the available cards. Select a card to view if it can be sent to a friend. Not all cards can be sent. Some cards can only be sent a certain number of times. Select the card you wish to send and select "Send."
Have the second player open the Mystery Gift page from the Main Menu. Select "Get from Friend" to receive the Mystery Gift and Wonder Card.