It contains a freely written message with up to 32 characters written across two 16-character rows of text. The player writes the message when giving this item to be held by a Pokémon. Mail uses a unique text entry interface that has a wider selection of characters than other text entry interfaces in these games. The message can be sent to other games of the same generation by trading the Pokémon holding this item.
The message remains available as long as this item is held by a Pokémon or stored in the Mailbox. This item is unable to have any message when stored in the Bag or in the Item Storage System, but there is the option to delete any existing message when storing this item in these places. Once the message is deleted from this item, the player is able to reuse it with a new message. A Pokémon holding this item cannot be placed in the PC or in the Pokémon Day Care. The "Move PKMN without mail" PC feature will remain unusable as long as there is any Pokémon holding this item in the party.
On the Game Boy Color, the message can be printed in grayscale using the Game Boy Printer accessory. The printing feature is accessed by pressing Start when the message is displayed.
On the Nintendo 3DSVirtual Console, when the player attempts to enter the Trade Center while one of the Pokémon in their party is holding Mail, they are given a warning on the touch screen not to include offensive material in Mail. The printing feature is disabled on the Virtual Console.
Webster's mail
This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason:
If Webster's mail is stored in Pokémon Stadium 2 and then retrieved, does it still work for this sidequest? (test also different languages, such as whether the French/German/Spanish mail still works after being stored in the English version, which lacks the additional diacritics)
Is it possible to use Pokémon Stadium 2 to write a new mail from scratch that can be accepted by this sidequest?
This message is originally held by Webster's Spearow named Kenya, but any Pokémon in the player's party is able to deliver it. The Pokémon who delivers it is permanently lost. Alternatively, the player is able to keep the message indefinitely, or keep only the Flower Mail and delete the message.
If the player attempts to write the same message on a Flower Mail and deliver it, this will not work because the text is checked byte-per-byte to determine if the mail is correct. Webster's message includes a line break before the end of the first line in all language versions, which is not possible to write using the text entry interface. However, as long as the message is correct, it is accepted with any signature or written on any mail item.
This message can be traded and delivered in other saved games of Pokémon Gold, Silver, and Crystal. This works only once per saved game, after Webster makes his request. This requires delivering the message in a game of the same language due to sharing the same text. However, the German version of Pokémon Gold and Silver uses an incorrect name for the Dark Cave, which was fixed in Pokémon Crystal (from Finsterhöhle to Dunkelhöhle). Due to the different message text, Webster's message obtained in German Gold or Silver cannot be delivered in German Crystal and vice versa.