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The Member Card (メンバーズカード Member's Card) is a Key item in the Sinnoh region games which allows the player to access the Harbor Inn which leads him/her to Newmoon Island. This item was introduced in Generation IV and with the card it allows you to capture the legendary Pokémon Darkrai. It is one of the four Sinnoh based event items, alongside Oak's Letter, the Azure Flute and the Secret Key.
Before you are allowed to enter the Harbor Inn, the player must first have completed the in-game story revolving around Cresselia and the Lunar Wing, in which you use this item to cleanse the nightmares from Sailor Eldritch's son, caused by Darkrai.
- Japan - December 1st 2008 to January 15th 2009
- North America - August 3rd 2009 to September 13th 2009
- PAL - August 3rd 2009 to September 13th 2009
- According to the date on the official artwork, the 1st December 1951, is approximately fifty years before the first Japanese distribution of the Member Card. This information is also corroborated up by the in-game description of the Member Card, which states that the last date marked on it was from fifty years ago.
- If the player either flees or causes Darkrai to faint, it can be rebattled numerous times before a successful capture.