Letter

Letters are very important items dropped from Parakarry in Paper Mario. They can be found in several locations throughout the Mushroom Kingdom. Delivering them to whoever the letter is written to rewards the player with a prize (usually, but not always, a Star Piece).

Mario and his partners also get letters from people all throughout the game, which can be checked at Mario's house and the Toad Town Post Office. Mario receives ten from the various characters he meets.

A large chain letter sequence makes for a fun side quest. A letter at the end of Mt. Rugged starts the whole thing which will last until Chapter 7. At the end the player will get the Lucky Day Badge. The player must have Parakarry out when giving a letter.
 * Deliver to Goompapa in Goomba Village
 * Deliver to Muss T. near Peach's Castle
 * Deliver to Koover at the Koopa Village entrance
 * Deliver to Fishmael at Toad Town's port.
 * Deliver back to Koover
 * Deliver to Mr. E. in Dry Dry Outpost's Toad House
 * Deliver to Miss T. near the Toad Town Dojo
 * Deliver to the Little Mouser inside Dry Dry Outpost's Item Shop
 * Deliver to Franky near Boo's Mansion's stairs
 * Deliver to Dane T. in front of Toad Town's railroad
 * Deliver to the Red Yoshi Kid near the item shop in Yoshi's Village
 * Deliver back to Dane T.
 * Deliver to Frost T. in Starborn Valley
 * Deliver all the way back to Goompapa

Also, in Super Mario Bros. 3, Mario will receive letters from Princess Peach, which usually contain a helpful item and an adventure tip. The last one is not from Peach, but from the evil Bowser, saying he kidnapped the princess.

Before Chapter 5 of Paper Mario: The Thousand-Year Door, Podley has a letter for Admiral Bobbery written by Bobbery's deceased wife, Scarlette, who wrote it as she was lying on her deathbed. Delivering the letter to Bobbery strengthens his resolve and he agrees to accompany Mario to Keelhaul Key. The letters from Paper Mario are replaced by emails.

A letter also appears in Luigi's Mansion, which is Mario's Letter. It reads, "L-o-o-k--o-u-t--f-o-r--B-o-o-s,--L-u-i-g-i-!".

Letters reappear in Super Mario 64, Super Mario Galaxy and Super Mario Galaxy 2. Mario receives one from Peach at the very beginning of the game, telling him to come to the castle to meet her. In the Super Mario Galaxy games, all letters are sent to Mailtoad, who then notifies Mario or Luigi when they arrive. In Super Mario Galaxy, letters are primarily sent from Luigi when he has become stuck in a particular galaxy and cannot get back without the player's help. In Super Mario Galaxy 2, letters are sent from a much wider range of characters, such as Gearmos and Jibberjays, and are used to accomplish a number of things, including notifying the player of any of The Chimp's challenges, giving the player tips on how to perform certain moves more expertly, advising the player of a special Power Star opportunity in a particular galaxy, offering the player advice and encouragement, challenging the player to a race, or making the player aware of any other special events or occurrences that may arise periodically as the game progresses. In both games, the player will occasionally receive letters sent from Princess Peach, which express her concern at being kidnapped (though she is sure the player will rescue her), and also contain several 1-Up Mushrooms.

In Super Mario 3D Land, a ransom note is sent by Bowser at the beginning of the game saying he kidnapped Princess Peach. Mario receives more letters from him and Peach as the game progresses, causing various reactions from the plumber.