You just have to open the mystery gift menu on both games and you and your friend will get a gift. It could be anything .New Pokemon or place.
In Pokémon Gold, Silver and Crystal, you do need to use the Mystery Gift option with a friend however in Pokémon Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black and White, you just need to use the Mystery Gift once a distribution either within a retail store or online is active.
Yes u need a friend for the mystery gift.U can only activate it once but use it as many times as u want.
Her BEST friend is Bridget Mendler.
From the title screen select "Mystery Gift" Choose "Check card" Click "A" On the desired card and a menu will appear. Choose Share(If the card is shareable) and click "A" Not all cards are shareable and I believe they may only be shared once.
Give them a gift.
This website, http://friendship.about.com/od/Gift-Giving/a/Gift-Ideas-For-Your-Best-Friend.htm, lists great ideas for your best friend who is turning 18. From that list, I think a friendship bracelet or a handwritten gift would be the best gift.
Something that they like. Since they're your best friend you should know what they want.
If one wishes to give a best friend a necklace as a gift this can be done for any occasion. One can choose to provide a gift like this for a birthday, Christmas or just as a spur of the moment surprise gift to express your friendship with the best friend.
A love letter.
Friendship
What about a piece of jewelry.
Your treasure box.
take her 4 a wallk by the beach
For a male best friend you could buy him something as simple as a tie or shoes or belt. If you really had no idea, get him a gift card. But the best option would be something funny to make him laugh.
To put it on your arms and take it over to your friend
Perhaps your best friend is not aware that things have changed in your friendship. You might not be best friends, but still are friends enough for an invitation. Buy a small gift and go. Answer this friend probably thinks you have good taste so he/she wants your gift. or he/she wants to be your friend again.