Flopside Pit of 100 Trials

The Flopside Pit of 100 Trials is a 100-room labyrinth in Super Paper Mario just like in Paper Mario: The Thousand-Year Door. However in this game there are two pits – one in Flopside and one in Flipside called the Flipside Pit of 100 Trials. Both were created to test the forces that guard the Pure Hearts. The Flopside version was used to study the powers of darkness. Accessing the Flopside Pit is done in a manner similar to its Flipside counterpart, except the switch that opens the entrance does not appear until the Flipside Pit is cleared.

In the Pit a random enemy in each room holds a key to a locked door that proceeds to the next room. The enemies in the Flopside Pit are far more dangerous than their Flipside counterparts, as they are all powerful, Dark versions. In every tenth room, a valuable item awaits. Shadoo is the boss of the pit; however, the first time Mario's group makes it to the 100th room, they will be sent back to the entrance and will have to make their way through the pit a second time in order to fight Shadoo.

Both pits have artwork on the walls depicting a Pure Heart and where it is found, which changes every 25 rooms. In the Flopside pit, the wallpaper of Rooms 1-25 depicts Squirps standing alongside the statue of Squirpina in the Whoa Zone, along with the corresponding light blue Pure Heart. Rooms 26-50 have a dark blue Pure Heart paired with King Croacus I and Floro Sapiens (a reference to Mario's sixth Pure Heart). Rooms 51-75 show King Sammer standing in a stylized version of his kingdom with the seventh (purple) Pure Heart, and rooms 76-99 have King Grambi, Queen Jaydes and the white Pure Heart representing Luvbi. Room 100 has a completely blank background, which may reference the World of Nothing or Castle Bleck.

The pit is designed to look like the LCD screen of an old Game & Watch System.

Room 1-9

 * Dark Goomba (Rooms 1, 2, 3 and 8)
 * Dark Koopa (Rooms 2, 5 and 9)
 * Dark Paragoomba (Rooms 3 and 4)
 * Dark Tech Cursya (Room 3)
 * Dark Spiked Goomba (Room 5)
 * Dark Squiglet (Rooms 6 and 7)
 * Dark Cherbil (Room 6)
 * Dark Spiny (Rooms 7 and 8)
 * Dark Cursya (Room 8)
 * Dark Spike Top (Room 9)

Room 11-19

 * Dark Fuzzy (Room 11)
 * Dark Squiglet (Room 11)
 * Dark Stone Buzzy (Rooms 12 and 17)
 * Dark Cleft (Rooms 13 and 14)
 * Dark Paratroopa (Room 13)
 * Dark Heavy Cursya (Room 13)
 * Dark Paragoomba (Room 14)
 * Dark Spania (Room 15)
 * Dark Goomba (Rooms 15 and 19)
 * Dark Dull Bones (Rooms 16 and 19)
 * Dark Spiny (Room 16)
 * Dark Tech Cursya (Room 16)
 * Dark Spike Top (Room 17)
 * Dark Fuzzy (Room 18)
 * Dark Spiked Goomba (Room 18)

Room 21-29

 * Dark Pokey (Rooms 21 and 24)
 * Dark Reversya Cursya (Room 21)
 * Dark Fuzzy (Rooms 21 and 23)
 * Dark Spania (Rooms 22 and 28)
 * Dark Longator (Room 23)
 * Dark Dull Bones (Room 24)
 * Dark Paragoomba (Room 24)
 * Dark Cleft (Room 25)
 * Dark Ruff Puff (Rooms 25 and 27)
 * Dark Dark Boo (Rooms 26 and 29)
 * Dark Heavy Cursya (Room 27)
 * Dark Squiglet (Room 27)
 * Dark Stone Buzzy (Room 28)
 * Dark Goomba (Room 29)

Room 31-39

 * Dark Shlurp (Room 31)
 * Dark Ruff Puff (Room 31)
 * Dark Sproing-Oing (Room 32)
 * Dark Squiglet (Rooms 32 and 35)
 * Dark Choppa (Room 33)
 * Dark Pokey (Room 33)
 * Dark Boomboxer (Rooms 34 and 36)
 * Dark Growmeba (Rooms 35 and 37)
 * Dark Reversya Cursya (Room 35)
 * Dark Cursya (Room 36)
 * Dark Cherbil (Room 38)
 * Dark Dark Boo (Room 39)
 * Dark Megabite (Room 39)

Room 41-49

 * Dark Striker (Rooms 41 and 49)
 * Dark Shlurp (Rooms 42 and 45)
 * Dark Cursya (Room 42)
 * Dark Heavy Cursya (Room 42)
 * Dark Boomboxer (Room 43)
 * Dark Choppa (Room 43)
 * Dark Sproing-Oing (Room 44)
 * Dark Tech Cursya (Room 44)
 * Dark Reversya Cursya (Room 44)
 * Dark Hammer Bro. (Room 46)
 * Dark Goomba (Room 46)
 * Dark Boomerang Bro. (Room 47)
 * Dark Paragoomba (Room 47)
 * Dark Fire Bro. (Room 48)
 * Dark Spiked Goomba (Room 48)
 * Dark Magikoopa (Room 49)
 * Dark Squiglet (Room 49)

Room 51-59

 * Dark Muth (Room 51)
 * Dark Chomp (Room 52)
 * Dark Clubba (Room 53)
 * Dark Squiglet (Rooms 54, 55 and 56)
 * Dark Spania (Room 55)
 * Dark Boomerang Bro. (Room 56)
 * Dark Tech Cursya (Room 56)
 * Dark Tileoid (Room 57)
 * Dark Hammer Bro. (Room 58)
 * Dark Cursya (Room 58)
 * Dark Striker (Room 59)
 * Dark Magikoopa (Room 59)

Room 61-69

 * Dark Magikoopa (Rooms 61, 62 and 63)
 * Dark Chomp (Rooms 61 and 65)
 * Dark Pigarithm (Room 62)
 * Dark Eeligon (Room 62)
 * Dark Heavy Cursya (Room 63)
 * Dark Tileoid (Room 63)
 * Dark Ninjoe (Rooms 64 and 69)
 * Dark Fire Bro. (Room 65)
 * Dark Hammer Bro. (Room 66)
 * Dark Clubba (Rooms 67 and 68)
 * Dark Tech Cursya (Room 67)
 * Dark Koopatrol (Room 68)
 * Dark Megabite (Room 69)
 * Dark Cherbil (Room 69)

Room 71-79

 * Dark Jawbus (Room 71)
 * Dark Koopa (Room 72)
 * Dark Koopatrol (Rooms 72 and 76)
 * Dark Barribad (Room 73)
 * Dark Choppa (Room 74)
 * Dark Eeligon (Room 74)
 * Dark Dayzee (Room 75)
 * Dark Pigarithm (Room 75)
 * Dark Ninjoe (Rooms 77 and 78)
 * Dark Tileoid (Room 77)
 * Dark Skellobit (Rooms 78 and 79)
 * Dark Spiky Skellobit (Room 79)

Room 81-89

 * Dark Spiky Skellobit (Rooms 81 and 83)
 * Dark Cursya (Room 81)
 * Dark Magikoopa (Room 82)
 * Dark Cherbil (Room 82)
 * Dark Skellobit (Room 83)
 * Dark Jawbus (Room 84)
 * Dark Magiblot (Rooms 85 and 89)
 * Dark Koopatrol (Room 86)
 * Dark Reversya Cursya (Room 86)
 * Dark Striker (Room 87)
 * Dark Squiglet (Room 87)
 * Dark Longator (Room 88)
 * Dark Tileoid (Room 89)

Room 91-99

 * Dark Cursya (Room 91)
 * Dark Tech Cursya (Room 91)
 * Dark Heavy Cursya (Room 91)
 * Dark Reversya Cursya (Room 91)
 * Dark Magikoopa (Room 92)
 * Dark Squiglet (Room 92)
 * Dark Hammer Bro. (Rooms 93 and 99)
 * Dark Boomerang Bro. (Rooms 93 and 99)
 * Dark Fire Bro. (Rooms 93 and 99)
 * Dark Magiblot (Room 94)
 * Dark Dayzee (Room 94)
 * Dark Cherbil (Room 94)
 * Dark Headbonk Goomba (Room 95)
 * Dark Jawbus (Room 96)
 * Dark Megabite (Room 96)
 * Dark Skellobit (Room 97)
 * Dark Spiky Skellobit (Room 97)
 * Dark Muth (Room 98)
 * Dark Koopatrol (Room 99)

Room 100

 * Shadoo (Appears the second time Mario's group makes it to Level 100. On the first visit, it does not reveal itself, and requests for the party to make a return trip before they can be fought.)

Prizes in the Pit of 100 Trials
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 * Room 10: Dashell Card
 * Room 20: Goombario Card
 * Room 30: Kooper Card
 * Room 40: Bombette Card
 * Room 50: Parakarry Card
 * Room 60: Bow Card
 * Room 70: Watt Card
 * Room 80: Sushie Card
 * Room 90: Lakilester Card
 * Room 100: Mario, Princess Peach, Bowser and Luigi Cards; cards of the dark version of each hero, infinite Flip for Mario, doubled attack strength for each hero; only obtained after defeating Shadoo.