The Bitlands

The Bitlands is a dimension located beyond the yellow door in Super Paper Mario. According to The InterNed, the overworld music of The Bitlands is titled "The Open Plane", and the music in the underground area beneath the two red pipes is titled "Nostalgic Underground", due to it being an altered version of the classic underground theme from Super Mario Bros.

Chapters

 * Chapter 3-1: When Geeks Attack The Bitlands
 * Chapter 3-2: Bloops Ahoy (The Tile Pool)
 * Chapter 3-3: Up, Up, and a Tree (The Dotwood Tree)
 * Chapter 3-4: The Battle of Fort Francis (Fort Francis)

Chapter 3-1: When Geeks Attack
Storyline text Mario and his new friends opened the door, unsure of what they would find.

All the while, Merlee's word about finding the "other two heroes" rang in their minds.

''Were these other heroes somewhere in this new world? If not, where?''

Meanwhile, the creeping void grew larger in the skies above Flipside.

''The hopes of all worlds rested on the heroes finding the next Pure Heart..." When Mario and co. reach the Bitlands, Tippi is kidnapped by Francis who then takes her to Fort Francis. The group finds its way through many obstacles, including a gigantic Koopa Troopa. Soon after, Mario discovers a makeshift fort populated by the remnants of the Koopa Troop. It is discovered that their leader is Bowser, who decides to fight Mario. He loses and joins Mario's party after a humorous conversation. The heroes then continue on to the Tile Pool. It is also possible to encounter a Pixl named Barry there. When the player talks to him, he says that they should return when they save Tippi. After Tippi is saved at the end of chapter 3-4, the player can return here and talk to Barry again. If the player does this, Barry will join them.

Enemies

 * Koopa Troopa
 * Piranha Plant
 * Magikoopa
 * Back Cursya
 * Blomeba
 * Spiked Goomba
 * Sproing-Oing
 * Hammer Bro
 * Paratroopa
 * Mega Koopa
 * Gloomba
 * Toopa Striker
 * Koopa Striker
 * Bullet Bill
 * Bill Blaster
 * Bowser (Mini Boss)

References to other Mario games
The Bitlands (especially Chapter 3-4) holds many references and similarities to older Mario games or other Nintendo-related things. These include:
 * Francis has a Famicom, a Super Nintendo Entertainment System, a Virtual Boy, a Nintendo 64, a Nintendo GameCube, a Game Boy, and (if the player flips into 3-D) a Wii.
 * Francis has a huge amount of posters showing Lady Bow and Bootler (this marks Lady Bow's second cameo appearance in Super Paper Mario), Petuni, Princess Peach, and other, less identifiable characters.
 * Mega Koopa is identical to a Koopa Troopa from Super Mario Bros. on the NES.
 * A Big Blooper is a mini-boss in the Tile Pool; Bloopers have had at least a mini-boss role in every Paper Mario game to date.
 * Bowser declares that there will be no more sequels; many Mario games have at least one sequel, and Bowser gets defeated in all Paper Mario sequels.
 * Francis is a big fan of Mario reference-filled TV shows, one of which involves Tubba Blubba (making almost all Paper Mario game to date have a giant Clubba at least mentioned in their corresponding Chapter 3s); another involves X-Nauts, and yet another involves Sir Grodus.
 * The underground cavern in 3-1 is an almost exact replica of World 1-2 in the original Super Mario Bros. The only differences are some of the power-ups have been changed, and a small area has been removed.
 * The overworld music has several interludes in which segments of the Super Mario Bros. theme may be heard clearly.
 * The player must take the second pipe in the Warp Zone look-alike area to continue the sub-chapter, which may be a reference to Super Mario Bros. when Mario or Luigi must take the second pipe in the Warp Zone to go to World 3, which is the world the Bitlands is.
 * Fort Francis has a few bars of music similar to those of Paper Mario, specifically, the music is similar to the Shiver Mountain music.

Trivia

 * When Mario comes to a part of Chapter 3-1 with all the colorful blocks, if he flips, he can see they are really simple poses of block statues.
 * The Bitlands is also one of only two worlds where there is at least one boss in each section, (Bowser in 3-1, who joins Mario's party after being defeated, Big Blooper in 3-2, Dimentio in 3-3, and Francis in 3-4), with Castle Bleck being the other world.
 * Furthermore, including the optional Pixls, Barry and Tiptron, the player gets four Pixls in the Bitlands, which is more than in any other world in Super Paper Mario.

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