The Secret of the Dirty Lake

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The Secret of the Dirty Lake
Secret Of The Dirty Lake.png
Location Bianco Hills
Mission # 6
Game Super Mario Sunshine
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You know the Cliff Spring Cave on the far end of the lake? Some nasty ooze came spilling out of it with no warning at all! Now, our beautiful lake is contaminated. It's so yucky!”
Pianta, Super Mario Sunshine

The Secret of the Dirty Lake is the sixth episode of Bianco Hills in Super Mario Sunshine. The episode's objective is to collect the Shine Sprite at the end of the secret obstacle course. After completing the episode once, the player can either return to this episode or enter the Cliff Spring Cave from Episode 7 or 8 to collect the Secret Shine Red Coins of the Dirty Lake.


Mario overlooking the cave entrance.

The entrance to the secret area is through a cave at the back of the large lake. However, the cave was barred off to prevent the goop inside from pouring out. Shadow Mario broke the barrier when he ran inside, which ended up polluting the entire lake. In order to get to the cave, Mario has to make use of several lily pads to traverse the lake, as trying to swim in the slimy water will deal damage to Mario. The lily pads will start to disintegrate as soon as Mario stands on one, so the player has to quickly move from one pad to the next in order to avoid falling in the water and make it to the cave. However, there are also extra coins in the lake in this episode, with 8 coins appearing at various points around the lake instead of the usual 4. Just before the cave, there are a few logs the player can use to climb to the entrance, which has a box with the Turbo Nozzle in it. Collecting this nozzle will unlock it for this level.

Upon entering the cave, Shadow Mario will appear to take FLUDD away. Mario will then be brought to an area with a series of moving platforms. The red and blue ones flip alternatively and the white cubes move and turn as Mario is on them. Mario will first have to jump between a set of red and blue platforms as they flip to reach the large blue platform afterward. Next is a large cube that will start spinning as it moves along once Mario jumps onto it, though the gap between it and the blue platform Mario is already on is wide, so the player needs to use either a Wall Jump or a Spin Jump to reach the cube. Should the player fall on the platform below, they can use a trampoline to jump back up. The large cube will bring the player to a long yellow platform with two arrow-shaped blocks that slide across it, pushing Mario off the edge if the player isn't careful. Next is another cube platform, but this one scales vertically and rotates as it moves upward. The player needs to stay on the block as it climbs to reach the next yellow platform. Afterward is the final set of red and blue flipping platforms the player needs to cross, though these ones are more spread out that the earlier set. On the final green platform is the Shine Sprite.

If in this episode Mario talks to the tourist Pianta on the cliff near where Petey was in the previous episode, who gives him the Blue Coin after cleaning him, he tells him, "Now, this is just a spectacular view!"

Names in other languages[edit]

Language Name Meaning
Japanese よごれた みずうみの ヒミツ
Yogoreta Mizūmi no Himitsu
The Secret of the Polluted Lake

French (NOE) Le secret du lac pollué
The Secret of the Polluted Lake
German Das Mysterium des Schleimsees
The Mystery of the Mucus Lake
Italian Il mistero del lago inquinato
The mystery of the polluted lake
Spanish (NOE) El secreto del lago contaminado
The Secret of the Polluted Lake


  • For unknown reasons, the sun cannot be seen in the sky of this episode.
  • The river in the bottomless pit below where Petey Piranha is sleeping in Episode 5 is also polluted in this episode.
  • In the Super Mario 3D All-Stars version of Super Mario Sunshine, prior to version 1.1.0, debug cubes could be seen in the secret level which marked the moving platforms.
  • There is a 100 Coin Shine programmed to spawn in the secret area, but due to the fact the yellow coins don't appear in the secret area it goes unused with the shine spawning on the yellow platform before the flipping blue and red platforms.