Secret Door

A Secret Door sticker

“Stick those door stickers up and they open secret areas... Secret doors rule.”

—Kersti, Paper Mario: Sticker Star

Secret Doors are a special type of sticker found in Paper Mario: Sticker Star. They are located exclusively at Outlook Point and sell for 80 coins. Their main purpose is to be Paperized onto silhouettes of doors found mainly on walls to see what is behind, usually several powerful stickers or a Thing. They can also be used in battle to successfully escape by having a door appear and have Mario walk through. However, in special occasions (such as when fighting Bowser), the door may collapse and fall on Mario, making him unable to escape.

A Secret Door is only found outside of Outlook Point twice; in Ice Flow after Mario reveals several Hidden Blocks, and in Bowser's Snow Fort after Mario defeats or pays the two Shy Guys holding the Traveling Toad hostage.

Secret Door locations

World 1

Level number	Level name	Secret Door location	Reward
1-1	Warm Fuzzy Plains	The outline for the Secret Door is found along the cliff wall in the area with the cave Mario finds the Scissors.	Thumbtack
1-2	Bouquet Gardens	The outline for the Secret Door is located on the cliff before the Comet Piece.	Flashy Fire Flower, Flashy Ice Flower, Flashy POW Block (First visit only)
1-3	Water's Edge Way	The outline for the Secret Door is located in an underground hole after the Bowser statue stops spitting water.	Bed, 35 Coins
1-4	Hither Thither Hill	The outline for the Secret Door is located at the cliff in the secret garden.	Matches
1-5	Whammino Mountain	The outline for the Secret Door is located in the underground passage accessed via Warp Pipe.	Bellows
1-6	Goomba Fortress	The outline for the Secret Door is found halfway into the fortress where the player comes across a bridge with fans in the background trying to blow Mario off. If he falls down, an outline for a door sticker can be seen on the right wall of the first bridge.	Squirt Gun

World 2

Level number	Level name	Secret Door location	Reward
2-1	Drybake Desert	The Secret Door is located behind the sole Sombrero Guy on the pyramid.	Car Battery
2-2	Yoshi Sphinx	The Secret Door location is on the ground level of the Sphinx. The player needs to go around to the right side of the base where the outline for the sticker will be along the wall guarded by a Spiny.	Paper Fan
2-3	Sandshifter Ruins	To reach the Secret Door, the player must take the following route: Go to the right sandfall, then up the stairs. Go down again, then down the left sandfall. Go down the right sandfall. At this point, there should be a long hallway with a Hammer Bro and a Paratroopa. Go through the door, and the Secret Door is on the other side of the room.	Lighter
2-4	Damp Oasis	The Secret Door is located directly right to the entrance to the oasis.	Hair Shears
2-5	Drybake Stadium	The Secret Door is located right at the entrance.	Flashy Eekhammer, Flashy Hurlhammer, Flashy Spike Helmet (First visit only)

World 3

Level number	Level name	Secret Door location	Reward
3-1	Leaflitter Path	In the second area of poisonous water that must be crossed, the Secret Door location is on a platform with a Ninji.	Searchlight
3-2	The Bafflewood	The outline for the Secret Door is down the the stairs on the right of the area after following this path: Right, left, right, right.	Violin
3-3	Wiggler's Tree House	The Secret Door is located on the second floor to the right of the fireplace.	HP-Up Heart
3-4	Strike Lake	The outline for the Secret Door is located in the last area. Jump over the fence to the south right after entering the area.	Drum
3-5	Loop Loop River	In the area with the Boomerang Bro., the Secret Door location is to the right of it.	Pillow
3-6*	Outlook Point	To the south of the shop is a spot to place a Secret Door sticker.	Fishhook
3-7	Rustle Burrow	The marked location is located on the ledge where the Hammer is.	Upright Vacuum
3-8	Tree Branch Trail	The location of the Secret Door can be found in the beginning of the level, in the wall near the Ninji.	Tape
3-9	Gauntlet Pond	The location of the Secret Door lies in the second area. Mario must use the star to become invincible and head to the wall near the Poison Bloopers. By using the Paperize abiity, Mario can place the door.	Shiny Fire Flower, Shiny Ice Flower, Shiny POW Block, Burnhammer, Chillhammer, Baahammer (First visit only)
3-10	Stump Glade	The Door Outline in this level is in the same area as the Comet Star on top of some boxes.	Square Can, 35 Coins
3-11	Holey Thicket	Past the Traveling Toad are a few holes, one of which can be dropped down into another cave that leads to another area with a few enemies and the Secret Door outline.	Balloon, 35 Coins
3-12	Whitecap Beach	On the left side of the island after Wiggler is reassembled.	Newspaper

World 4

Level number	Level name	Secret Door location	Reward
4-1	Snow Rise	The Secret Door mark is located on the lower slope's left side after the snow is melted away.	Cell Phone
4-2*	Ice Flow	The Secret Door is located on a cliff to the left of the ice waterfall in the first cave.	Hair Dryer
4-3	The Enigmansion	The Secret Door is at the top of the rear staircase. It provides a shortcut back to Decalburg, at the Sling-a-Thing location and the Things seller.
4-4	Shaved-Ice Cave	No Secret Door
4-5	Whiteout Valley	The outline for the Secret Door is on the wall of the cave shortly after entering the level.	Flashlight
4-6*	Bowser's Snow Fort	The outline for the Secret Door is found at the beginning of the level on the right side of the entrance to the building. This will lead to the VIP waiting line for the mine cart ride, allowing Mario to cut in front of the Shy Guys in line.

World 5

Level number	Level name	Secret Door location	Reward
5-1	Shy Guy Jungle	The Secret Door is located on the far right of the ledge where the last Bridge Piece scrap is.	Tailor Shears
5-2	Jungle Rapids	The Secret Door is located to the right of the boathouse.	Mini Vacuum
5-3	Long Fall Falls	The Secret Door is located to the left of the regular exit.	Luxurious Bed
5-4	Chomp Ruins	The Secret Door is located on the second leveled platform by the sawblades on the second floor.	Air Conditioner
5-5	Rugged Road	The Secret Door is located on the right side of the big lava pool. It can be accessed after freezing the area.	Basin
5-6	Rumble Volcano	The outline for the Secret Door is found on the top floor of the volcano. After going left into the cave, it will be on the wall.	Guitar

World 6

Level number	Level name	Secret Door location	Reward
6-1	Gate Cliff	No Secret Door
6-2	Bowser Jr.'s Flotilla	The Secret Door is at the back-left of the first room Mario enters.	Megaflash Jump, Shiny Hurlhammer, Shiny POW Block, Shiny Line Jump
6-3	Bowser's Sky Castle	No Secret Door

Note

^* - A Secret Door sticker can be found in the level.

Names in other languages

Language	Name	Meaning
Japanese	ひみつドア Himitsu Doa	Secret Door
Chinese	秘密门 (Simplified) 秘密門 (Traditional) Mìmì Mén	Secret Door
German	Geheimtür	Secret Door