Mailbox SP

The Mailbox SP is an important item Mario carries throughout Paper Mario: The Thousand-Year Door. It serves as a virtual mailbox, being able to send and receive messages from other people. Despite having it from the start, Mario does not receive a message until he reaches Petalburg. The design of the Mailbox SP resembles the Game Boy Advance SP.

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Characters	Protagonists	Mario • Princess Peach • Luigi • TEC-XX
	Antagonists	Bowser • Kammy Koopa • Sir Grodus • Lord Crump • Secret Society of X-Nauts • The Three Shadows (Beldam, Marilyn, Vivian, Doopliss) • Shadow Queen
	Partners	Goombella • Koops • Madame Flurrie • Yoshi • Vivian • Admiral Bobbery • Ms. Mowz
	Other	Arfur • Audience • Bandy Andy • Battle Master • Billy • Black Chest Demon • Blooey • Bob • Bob-omb Squad • Bobolink • Bomberto • Bootler • Bub • Bub-ulber • Businessman • Charlieton • Chef Shimi • Chestnut King • Chet Rippo • Chomp Country • Cleftor • Cranberry • Craw-Daddy • Creepy Steeple Boo • Darkly • Dazzle • Dead Bones • Destructors • Doe T. • Don Pianta • Dupree • Eddy the Mask • Eve • Excess Express Conductor • Excess Express Engineer • Fahr Outpost Mayor • Flavio • Francesca • Frankie • Fred • Fuzz • Garf • General White • Ghost T. • Gloomer • Gob • Goldbob • Goom Goom • Goomba Bros. • Goomez • Goomfrey • Goomther • Goose • Grifty • Grubba • Hamma, Bamma, & Flare • Hamma Jamma's father • Hamma Jamma's grandfather • Hand-It-Overs • Hayzee • Heff T. • Herb T. • Hizza • Ishnail • Jabble • Jerry • Johnson • Jolene • Jr. Troopa • Kolorado's father • Koopie Koo • Koopley • Koopook • KP Koopas • KP Pete • Kroop • Lady Bow • Lahla • Laki • Larson • Lucky • Luigi • Lumpy • Magikoopa Masters • Maitre Delish • Master Crash • Mayor Dour • McGoomba • Merlee • Merlon • Merluvlee • Maude and Flo • Mind-Bogglers • Minister Crepe • Mousimilian • Mr. Hoggle • Niff T. • Nob • Old Man Skoo • Pa-Patch • Parakarry • Parrot • Peeka • Pennington • Petuni • Pianta Syndicate • Pierre • Pine T. • Pine T. Jr. • Plenn T. • Podler • Podley • Poker Faces • Pokey Triplets • Porter • Prince Mush • Princess Eclair • Professor Frankly • Pungent • Pungry • Punio • Puniper • Puni Elder • Punk Rocks • Rob • Robbo Gang • Rocko • Ronnie • Scarlette • Screamy • Shellshock • Shellshockers • Sir Swoop • Spike Storm • Spiky Joe • Stewart • Swindell • Swob • Sylvia • TEC-XX • The Koopinator • The Traveling Sisters Three • Thriff T. • Tiny Spinies • Toadette • Toadia • Toadsworth • Toad waitress • Toce T. • Tony • Toodles • Torque • Vinny • Wings of Night • Wonky • Zess T. • Zip Toad
Locations	Areas	Boggly Woods • Broadshroom • Circuit Break Island • Creepy Steeple • Deepdown Depot • Excess Express • Fahr Outpost • Flurrie's House • Fresh Juice Shop • Glitz Pit • Glitzville • Great Tree • Grimble Forest • Hatesong Tower • Herb T.'s Place • Hooktail Castle • Hot Dog Stand • Inn • Item Shop • Jazzafrazz Town • Keelhaul Key • Keelhaul Galleria • Lovely Howz of Badges • Mario's House • The Moon • Netherworld • Niff T.'s Shop • Northwinds Mart • Palace of Shadow • Petalburg • Petal Meadows • Pianta Parlor • Pirate's Grotto • Pit of 100 Trials • Podley's Place • Plumpbelly Village • Poshley Heights • Poshley Sanctum • Pudding Continent • Pungent's Shop • Rapturous Ruins • Riddle Tower • Riverside Station • Rogueport • Rogueport Sewers • Rumblebump Volcano • Sales Stall • Shhwonk Fortress • Souvenir Shop • Strudel Continent • Toad Bros. Bazaar • Trouble Center • Twilight Shop • Twilight Town • Twilight Trail • Waffle Kingdom • Westside Goods • X-Naut Fortress
	Transportations	Excess Express • Black Skull
	Bowser levels	World 1 • World 2 • World 3
Bosses	Main/recurring	Lord Crump • Bowser • Kammy Koopa • Sir Grodus • Shadow Sirens • Gloomtail • Bonetail
	Chapter	Hooktail • Magnus von Grapple • Macho Grubba • Doopliss • Cortez • Smorg • Magnus von Grapple 2.0 • Shadow Queen
	Mini-bosses	Blooper • Gold Fuzzy • Red Bones • Iron Cleft • Rawk Hawk • Gus • Atomic Boo • Dark Bones
Enemies	Enemies	Amazy Dayzee • Arantula • Badge Bandit • Bandit • Bald Cleft • Big Bandit • Bill Blaster • Bob-omb • Bob-ulk • Bombshell Bill • Bombshell Bill Blaster • Boo • Boomerang Bro • Bristle • Bulky Bob-omb • Bullet Bill • Buzzy Beetle • Chain Chomp • Cleft • Crazee Dayzee • Dark Boo • Dark Bristle • Dark Craw • Dark Koopa • Dark Koopatrol • Dark Lakitu • Dark Paratroopa • Dark Puff • Dark Wizzerd • Dry Bones • Dull Bones • Elite Wizzerd • Elite X-Naut • Ember • Fire Bar • Fire Bro • Flower Fuzzy • Frost Piranha • Fuzzy • Fuzzy Horde • Gloomba • Goomba • Green Fuzzy • Green Magikoopa • Grodus X • Hammer Bro • Hyper Bald Cleft • Hyper Cleft • Hyper Goomba • Hyper Paragoomba • Hyper Spiky Goomba • Ice Puff • Iron Cleft • Koopa Troopa • Koopatrol • KP Koopa • KP Paratroopa • Lakitu • Lava Bubble • Magikoopa • Mini-X-Yux • Mini-Yux • Mini-Z-Yux • Moon Cleft • Pale Piranha • Parabuzzy • Paragloomba • Paragoomba • Paratroopa • Phantom Ember • Pider • Piranha Plant • Poison Pokey • Poison Puff • Pokey • Putrid Piranha • Red Chomp • Red Magikoopa • Red Spike Top • Ruff Puff • Shady Koopa • Shady Paratroopa • Sky-Blue Spiny • Spania • Spike Top • Spiky Gloomba • Spiky Goomba • Spiky Parabuzzy • Spinia • Spiny • Spunia • Swampire • Swooper • Swoopula • Whacka • White Magikoopa • Wizzerd • X-Fist • X-Naut • X-Naut PhD • X-Punch • X-Yux • Yux • Z-Yux
Items	Battle	Boo's Sheet • Coconut Bomb • Courage Shell • Courage Meal • Dizzy Dial • Earth Quake • Egg Bomb • Fire Flower • Fright Mask • Hot Sauce • HP Drain • Ice Storm • Love Pudding • Mini Mr. Mini • Mr. Softener • Mystery • Peach Tart • Point Swap • POW Block • Power Punch • Repel Cape • Ruin Powder • Shooting Star • Sleepy Sheep • Spite Pouch • Stopwatch • Thunder Rage • Thunder Bolt • Volt Shroom • Zess Dynamite
	Recovery	Cake Mix • Choco Cake • Coco Candy • Coconut • Couple's Cake • Dried Bouquet • Dried Shroom • Electro Pop • Fire Pop • Fresh Juice • Fresh Pasta • Fried Egg • Fruit Parfait • Golden Leaf • Gradual Syrup • Healthy Salad • Heartful Cake • Honey Candy • Honey Shroom • Honey Super • Honey Syrup • Honey Ultra • Horsetail • Hot Dog • Icicle Pop • Ink Pasta • Inky Sauce • Jammin' Jelly • Jelly Candy • Jelly Shroom • Jelly Super • Jelly Ultra • Keel Mango • Koopa Bun • Koopa Tea • Koopasta • Life Shroom • Mango Delight • Maple Shroom • Maple Super • Maple Syrup • Maple Ultra • Meteor Meal • Mistake • Mousse Cake • Mushroom • Mystic Egg • Omelette Meal • Peachy Peach • Poison Shroom • Shroom Broth • Shroom Cake • Shroom Crepe • Shroom Fry • Shroom Roast • Shroom Steak • Slow Shroom • Snow Bunny • Space Food • Spaghetti • Spicy Pasta • Spicy Soup • Super Shroom • Tasty Tonic • Trial Stew • Turtley Leaf • Ultra Shroom • Whacka Bump • Zess Cookie • Zess Deluxe • Zess Dinner • Zess Frappe • Zess Special • Zess Tea
	Key	Autograph • Battle Trunks • Black Key • Blanket • Blimp Ticket • Blue Key • Blue Potion • Box • Briefcase • Card Key • Castle Key • Champ's Belt • Chuckola Cola • Cog • Contact Lens • Cookbook • Data Disk • Dubious Paper • Elevator Key • Galley Pot • Gate Handle • Gold Card • Gold Ring • Goldbob Guide • Green Potion • Grotto Key • House Key • Lottery Pick • Magical Map • Mailbox SP • Moon Stone • Necklace • Old Letter • Orange Potion • Package • Palace Key • Platinum Card • Present • Puni Orb • Ragged Diary • Red Key • Red Potion • Routing Slip • Shell Earrings • Shine Sprite • Shop Key • Silver Card • Skull Gem • Special Card • Star Key • Station Key • Steeple Key • Storage Key • Strange Sack • Sun Stone • Superbombomb • Super Luigi series • The letter "p" • Train Ticket • Ultra Stone • Up Arrow • Vital Paper • Wedding Ring • Wrestling Mag
	Badges	All or Nothing • Attack FX B • Attack FX G • Attack FX P • Attack FX R • Attack FX Y • Bump Attack • Charge • Charge P • Chill Out • Close Call • Close Call P • Damage Dodge • Damage Dodge P • Defend Plus • Defend Plus P • Double Dip • Double Dip P • Double Pain • Feeling Fine • Feeling Fine P • Fire Drive • First Attack • Flower Finder • Flower Saver • Flower Saver P • FP Drain • FP Plus • Hammer Throw • Hammerman • Happy Flower • Happy Heart • Happy Heart P • Head Rattle • Heart Finder • HP Drain • HP Drain P • HP Plus • HP Plus P • Ice Power • Ice Smash • Item Hog • Jumpman • L Emblem • Last Stand • Last Stand P • Lucky Day • Lucky Start • Mega Rush • Mega Rush P • Money Money • Multibounce • Nostalgic Tunes • P-Down, D-Up • P-Down, D-Up P • P-Up, D-Down • P-Up, D-Down P • Peekaboo • Piercing Blow • Pity Flower • Power Bounce • Power Jump • Power Plus • Power Plus P • Power Rush • Power Rush P • Power Smash • Pretty Lucky • Pretty Lucky P • Quake Hammer • Quick Change • Refund • Return Postage • Shrink Stomp • Simplifier • Sleepy Stomp • Slow Go • Soft Stomp • Spike Shield • Super Appeal • Super Appeal P • Timing Tutor • Tornado Jump • Unsimplifier • W Emblem • Zap Tap
	Other	Crystal Stars • Dramalama Plaque • Fat Dog • Gold Bar • Gold Bar x3 • Inn Coupon • Magical Map • Marvelous Compass • Mushroom Full Course • Nitro Honey Syrup • Southern Fried Egg Dog of Tastiness • Star Piece • The Big Green 01
Techniques	Moves	Action command • Appeal • Art Attack • Boat Mario • Bob-ombast • Body Slam • Bomb • Bomb Squad • Charge • Clock Out • Dodgy Fog • Earth Tremor • Fiery Jinx • First Strike • Flee • Gale Force • Ground Pound • Guard • Gulp • Headbonk • Hold Fast • Infatuate • Jump • Kiss Thief • Lip Lock • Love Slap • Mini-Egg • Multibonk • Plane Mario • Power Lift • Power Shell • Rally Wink • Shade Fist • Shell Shield • Shell Slam • Shell Toss • Showstopper • Smooch • Spin Hammer • Spring Jump • Stampede • Stylish Move • Superguard • Supernova • Sweet Feast • Sweet Treat • Tattle • Tease • Veil
Miscellaneous	Statuses/ailments	Allergic • Badge Point • Burn • Charged • Confused • Danger • Defense • DEF-Up • Dizzy • Dodgy • Electrified • Fast • Flower Point • Frozen • Heart Point • Huge • Immobilized • Invisible • No Skills • Payback • Peril • Poison • Power • POW-Down • POW-Up • Regeneration • Sleep • Slow • Soft • Star Point • Star Power • Tiny
	Objects	! Switch • Badge • Black chest • Black Skull • Blue Pipe • Blue Switch • Brick Block • Candy Cane • Cheep Blimp • Chomp Rock • Coin Block • Coral • Crystal Ball • Elevator • Giant Cannon • Goal Pole • Heart • Hidden Block • Koopa Clown Car • Meat • Metal Block • Pianta Token • Power-draining machine • Recovery Block • S.S. Flavion • Save Block • Shine Block • Star Piece • Stone Block • Stone Keys • Teleporter • The Thousand-Year Door • Treasure chest • X-Ship • Yellow Block
Items in bold appear only in the Nintendo Switch remake.