The only way to get Eon Mail in Pokemon G/S/C is if you have a Pokemon Pikachu (a special Tamogatchi-type pedometer), which you can then send 000 points to your game through Mystery Gift.
some guy gives it to you if you give him mail
By trading one from gold/silver and cloning it Dani (the girl Pokemon trainer on Pokemon crystal version) By trading one from gold/silver and cloning it Dani (the girl Pokemon trainer on Pokemon crystal version)
nothing
The Mystery Gift feature of Pokemon Gold, Silver, and Crystal versions is a way of communication between two games. It uses the infrared port of the Game Boy Color to trade items between games. Some of these items are unobtainable without cheats/usage of this feature. These items include: room decorations, special mail, etc.
By giving it mail, entering a message then trading it to a friend's game. Any pokemon can hold mail in any game version from generation 2 (Gold/Silver/Crystal) onward, so it's not specific only to wingull.
there is no way you can trade mail on pokemon black
Give it a mail item and trade it.
to send air mail(or any other type of mail in any game) you have to give the mail to a Pokemon and trade the Pokemon to somebody else so they get to read it.
You give it to a Pokemon that is about to be traded and hope the person will take the mail.
nothing I have found no use for the mail in any Pokemon game so sorry =(
A Pokemon or item and mail with Pokemon
Trade it