X-Naut Fortress

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X-Naut Fortress
Mario and Goombella inside the X-Naut Fortress, just past the entrance.
First appearance Paper Mario: The Thousand-Year Door (2004)
Latest appearance Paper Mario: The Thousand-Year Door (Nintendo Switch) (2024)
Greater location The Moon
Ruler Grodus
Inhabitants X-Nauts, X-Naut PhDs, Elite X-Nauts, Z-Yux

The X-Naut Fortress is Grodus' main base of operations which is located on the moon and the home to the X-Nauts in Paper Mario: The Thousand-Year Door. Princess Peach is also taken to here. The last Crystal Star, the Crystal Star, is held there, and Mario and his friends have to use Big Bob in Fahr Outpost to reach this place and fight Lord Crump (while controlling Magnus von Grapple 2.0) to get the star. Grodus travels between the earth and his fortress using a teleporter, which has one end located in his laboratories and the other end located in Rogueport Underground. The base is also the home of TEC-XX, which is the main computer of the whole fortress. Also, after Mario gets the sixth Crystal Star, Grodus takes Princess Peach and leaves the fortress (possibly giving it to Lord Crump) so he can go to the Palace of Shadow. After Mario successfully destroys Magnus von Grapple 2.0, he gets the seventh Crystal Star. After that, the fortress explodes and Mario is unable to go back until the final boss is defeated.

The fortress is essentially a five-story building built deep under the moon. It is all connected by a series of hallways and two elevators. The deeper Mario or Peach go, the dimmer the lighting is.

When the player Spring Jumps into the air duct from the Yux lab on sublevel 2 and uses Paper Mode to slip thought the vent on the far right, they land in a changing stall where Peach used to put on the X-Naut suit. If they pull the curtain back, Mario and his partners become 8-bit. This lasts until they leave the room.

Enemies[edit]

After the chapter is cleared, no enemies appear in the X-Naut Fortress.

Formations[edit]

Main section: List of Paper Mario: The Thousand-Year Door enemy formations § X-Naut Fortress

Collectibles[edit]

Field/Given/Objects[edit]

Item Location Location image
Original Remake
6 Coin Coins
Feeling Fine Feeling Fine
Feeling Fine P Feeling Fine P 		To the left of sublevel 1, they are on the item platform to be retrieved with the crane. Mario near the items collectable by crane in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Mario near the items collectable by crane in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Cog (Paper Mario: The Thousand-Year Door) Cog In the transportation room on sublevel 2, it is on top of the controller. Accessible from the air vent with Koops or Yoshi Kid. The Cog and the teleporter in the X-Naut Fortress Mario near the Cog in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Crystal Star Crystal Star Dropped after Magnus von Grapple 2.0 is defeated. Mario getting the Crystal Star in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Mario getting the Crystal Star in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Security Key Security Key (♥︎) To the right of sublevel 2, it is on the computer desk in the back room of Grodus's area. X-Naut Fortress screenshot from Paper Mario: The Thousand-Year Door Mario near the Security Key with a heart on it in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Security Key Security Key (♣︎) Nintendo GameCube
Security Key Security Key (★) Nintendo Switch 		To the right of sublevel 3, it is in the factory room. Accessible from the airplane panel near the right exit. X-Naut Fortress screenshot from Paper Mario: The Thousand-Year Door Mario near the Security Key with a star on it in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Ultra Mushroom Ultra Mushroom To the right of sublevel 3, in the factory room, it is on the left high platform in the background. X-Naut Fortress screenshot from Paper Mario: The Thousand-Year Door Mario near a Ultra Mushroom in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.

Remake only[edit]

Item Location Location image
Security Key Security Key (♣︎) To the left of sublevel 4, it is held by an Elite X-Naut in the shower. Nintendo Switch Mario near the Security Key with a club on it dropped by Elite X-Naut in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Ultra Mushroom Ultra Mushroom In the factory of Sublevel Three; on a high platform in the background on the far east. Nintendo Switch Mario near a Ultra Mushroom in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.

Blocks[edit]

Item Location Location image
Original Remake
Super Mushroom Super Mushroom Nintendo GameCube
Ultra Mushroom Ultra Mushroom Nintendo Switch 		To the right of level 1, it is in the yellow question block on the back side. First ? Block in X-Naut Fortress of Paper Mario: The Thousand-Year Door. First block in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.
Sleepy Sheep Sleepy Sheep To the left of sublevel 2, it is in the yellow question block on the back side. Second ? Block in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Second block in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.
HP Drain (item) HP Drain To the left of sublevel 3, it is in the question block on the south side. Last ? Block in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Last block in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.

Star Pieces[edit]

Location Location image
Original Remake
To the left of sublevel 1, it is on the item platform to be retrieved with the crane. Mario getting the Star Piece near the crane in the X-Naut Fortress in Paper Mario: The Thousand-Year Door. Mario getting the Star Piece near the crane in the X-Naut Fortress in the remake of the Paper Mario: The Thousand-Year Door for the Nintendo Switch.
In the southwest corner of the air vent on Sublevel 2. Mario getting the Star Piece on the ceiling of sublevel 2 of X-Naut's Fortress in Paper Mario: The Thousand-Year Door. Mario getting the Star Piece on the ceiling of sublevel 2 of X-Naut's Fortress in the remake of the Paper Mario: The Thousand-Year Door for the Nintendo Switch.

Treasure chests[edit]

Item Location Location image
Original Remake
Elevator Key (X-Naut Fortress) Elevator Key (Blue) To the right of level 1, it is guarded in a chest beyond the electrical floors. First treasure chest in X-Naut Fortress of Paper Mario: The Thousand-Year Door. First treasure chest in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.
Security Key Security Key (◆) To the left of sublevel 2, it is guarded in a chest beyond the electrical floors. Second treasure chest in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Second treasure chest in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.
Elevator Key (X-Naut Fortress) Elevator Key (Red) Won after the 66th Trivia Quiz-Off. In the original, the Thwomp drops the card only, but in the remake, he drops a chest containing said card. Mario near the Elevator Key in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Third treasure chest in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.
Security Key Security Key (♠︎) To the left of sublevel 3, it is guarded in a chest beyond the electrical floors. Last treasure chest in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Last treasure chest in the X-Naut Fortress in the remake of Paper Mario: The Thousand-Year Door for the Nintendo Switch.

Only obtainable by Peach[edit]

Item Location Location image
Original Remake
Blue Potion Blue Potion
Green Potion Green Potion
Red Potion Red Potion
Yellow Potion Orange Potion Nintendo GameCube
Yellow Potion Yellow Potion Nintendo Switch 		On the desk in the lab on sublevel 2. Princess Peach in front of the table with the potions in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Princess Peach in front of the table with the potions in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
Data Disk Data Disk To the right of sublevel 2, it is on the shelf in the computer room behind Grodus's room. Invisible Princess Peach getting a Data Disk in X-Naut Fortress of Paper Mario: The Thousand-Year Door. Invisible Princess Peach getting a Data Disk in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.

Crane game (remake only)[edit]

After leaving and re-entering the X-Naut Fortress at least once in the Nintendo Switch remake, either during Chapter 7 or the post-game, new items appear in the crane room on Sublevel One if the player had already collected every item beforehand. There are four batches of different items to collect. To make the next batch appear, it is necessary to collect every item on the current batch, leave the X-Naut Fortress, and return to it.

Batch set Items Location image
1 POW Block POW Block, Sleepy Sheep Sleepy Sheep, Courage Shell Courage Shell, Mr. Softener Mr. Softener, 5 Coin Coins Mario near the items collectable by crane during post-game (first batch) in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
2 Volt Mushroom Volt Mushroom, Dizzy Dial Dizzy Dial, Power Punch Power Punch, Mini Mr. Mini Mini Mr. Mini, 5 Coin Coins Mario near the items collectable by crane during post-game (second batch) in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
3 Slow Mushroom Slow Mushroom, Super Mushroom Super Mushroom, Maple Syrup Maple Syrup, Gradual Syrup Gradual Syrup, 5 Coin Coins Mario near the items collectable by crane during post-game (third batch) in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.
4 Ruin Powder Ruin Powder, Stopwatch Stopwatch, Gold Bar Gold Bar, HP Drain (item) HP Drain, Spite Pouch Spite Pouch, 4 Coin Coins Mario near the items collectable by crane during post-game (fourth batch) in X-Naut Fortress of Paper Mario: The Thousand-Year Door for Nintendo Switch.

Area Tattles[edit]

  • "Who knew there'd be such a weird building on the moon... It's kind of crazy, actually. I mean, it's got a big glass dome to keep all of the air from leaking out...What's that? Yeah, now that you mention it, I guess we were OK out there with no air to breathe...................................Yeah, I'd rather not think about that too much, I guess. Let's change the subject." (GCN)
    • "Who knew there'd be such a weird building on the moon... It's almost unbelievable, actually. At least it's got a big glass dome to keep all of the air from leaking out...What's that? Yeah, now that you mention it, I guess we were OK out there with no air to breathe. ... Yeah, I'd rather not think about that too much, I guess. Let's change the subject." (Switch)
  • "This is the X-Naut Fortress. This seems to be the only way in or out. The stars look really nice through these windows, but I guess now's not the time..." (GCN)
    • "This is the X-Naut Fortress. This seems to be a way to get in and out. The stars are really pretty out here...or what you can see of them through these fortress windows, anyway." (Switch)
  • "This is a fortress corridor. An elevator connects it to the lower floors. I guess this fortress extends pretty far beneath the surface of the moon, huh? I mean, I hate Grodus, but I gotta give him some props for a pretty cool evil hideout."
  • "This room looks like it was meant to store something... It's booby-trapped, I think. Not to totally change the subject or anything, but how's your memory, Mario? If you have trouble recalling the full path, you oughta leave and reenter."
  • "This looks like a storage room for valuables. The crane can grab stuff up there. It should work if you set a gear in place and press those switches in order... I'm sure you can handle it. It's not exactly moon-rocket science here."
  • "What's this room for, huh? I feel like I've seen that face somewhere before... Hmmm... Oh well, forget about it, I guess."
  • "This room looks like it was meant to store something... It's booby-trapped, I think. If you wander off the correct path, it looks like you'll take damage, don'tcha think? Rooms like this ALWAYS have a hint, though. It's like, a law. See anything like that?"
  • "This is Grodus's lab. He must have his researchers work on various potions here. I don't think we should touch any of this stuff, though... One wrong move and... KABOOOOOOOM! ...Know what I mean?"
  • "This looks like some kinda teleporter. Who knows where that thing would send us! Maybe that's what the X-Nauts used to go between the moon and the earth. I think we have to switch it on (GCN) / press the button (Switch) and then stand on the platform to use it."
  • "This looks like a lab for genetic experimentation...maybe Yux were made here. I guess they must have some pretty advanced technology if they can do stuff like that. Hey, by the way, Mario... You see up there? One of those ceiling panels is loose. Don't you have some super move or something that can get us up there?"
  • "This is a changing room. I guess even X-Nauts have to change out of their uniforms... But what do you think they look like under those suits? I'm...not gonna think about it. There's a ventilation duct in the ceiling at one end... That's not good for privacy!"
  • "This place is a bit overdone, huh? It just screams, 'Hey! I'm an evil mastermind!' I wonder if poor Princess Peach got dragged in here before?"
  • "What's this room for, huh? Is it some kind of office for the X-Naut boss or what? Maybe we should give it a once-over to make sure we don't miss anything. Boy, and what's with these tanks full of Nibbles? Jeepers, that creeps me out."
  • "This room looks like it was meant to store something... It's booby trapped, I think. If you stay on the tiles that were lit up, I think you'll be OK, Mario. Er... But you should totally go first, one way or the other..."
  • "There are three panels here. I guess that means we need three Card Keys, huh? There must be something pretty important behind this door to have such security..." (GCN)
    • "There are four terminals here. Is this part of a locking mechanism for the door? There must be something pretty important behind this door to have such security" (Switch)
  • "This is the X-Naut factory. I think they make all kinds of stuff here. It's pretty complicated, what with the crane and the pipe, and all those gears... Maybe we should just take this room one bit at a time, don'tcha think?"
  • "This is where they built Magnus Von Grapple and Magnus Von Grapple 2.0. But there doesn't seem to be anything here now... Nope. Let's go, Mario."
  • "This is the computer room. This must be where Princess Peach met with TEC."
  • "Wonder what this room's for? There are beds and lockers, but we can't nap here. There's nothing else, really. The weird thing is, it kind of smells nice in here, huh? Why do you think that is?"
  • "This is a...shower room? I guess every evil-guy base of ultimate doom needs one... Just because you're evil doesn't mean you enjoy B.O., y'know what I mean?"
RogueportPetalburgPetal MeadowsHooktail CastleThe Great TreeBoggly WoodsPirate's GrottoKeelhaul KeyTwilight TownTwilight TrailFahr OutpostCreepy SteepleMoonX-Naut FortressGlitzvillePoshley SanctumRiverside StationPoshley HeightsA map of Rogueport and the surrounding areas visited during Paper Mario: The Thousand-Year Door.
Click an area to open the relevant article.

In-game map description[edit]

  • The fortress of the dubious X-Nauts. Their leader, Grodus, lives here. (GCN)
  • The fortress of the dubious X-Nauts and their leader Grodus. (Switch)

Gallery[edit]

  • Grodus receives a message while examining Peach.
    Grodus receives a message while examining Peach.
  • The Shadow Sirens discuss their plans.
    The Shadow Sirens discuss their plans.
  • Peach takes a shower.
    Peach takes a shower.
  • Peach comes out of the shower with her hair tied back into a ponytail.
    Peach comes out of the shower with her hair tied back into a ponytail.
  • A door opens.
    A door opens.
  • Peach examines the opened door.
    Peach examines the opened door.
  • Peach enters a room with a mysterious computer.
    Peach enters a room with a mysterious computer.
  • Peach writes an email for Mario.
    Peach writes an email for Mario.
  • An X-Naut PhD arrives at the office of Grodus.
    An X-Naut PhD arrives at the office of Grodus.
  • Grodus gives instructions to the X-Naut PhD.
    Grodus gives instructions to the X-Naut PhD.
  • PMTTYD Post Ch2 Sir Grodus Close-Up.png
  • PMTTYD Post Ch2 Mushroom Ball.png
  • PMTTYD Grodus Laughing.png