World 4-8: Naval Piranha's Sewer

Welcome to the final, most challenging stage of World 4! Naval Piranha's Sewer is a water-logged gauntlet filled with tricky currents, hidden passages, and of course, the menacing Naval Piranhas themselves. Be prepared for some precise platforming and egg-tossing.

Initial Descent and First Collectibles

Start of the Stage: As you begin, head right. You'll immediately encounter a series of platforms and flowing water.
Winged Cloud 1: Just above the first small waterfall, you'll spot a Winged Cloud. Hit it to reveal 50 Coins.
Wonder Wool 1: Continue right. You'll see a red pipe leading downwards. Before entering, look for a hidden alcove to the left of the pipe, slightly above the water level. Ground Pound the suspicious-looking fabric to reveal a hidden area containing Wonder Wool 1.
Character Coin 1: Descend the red pipe. You'll land in a submerged area. Swim right, avoiding the incoming Naval Piranhas. The first Character Coin is floating in the middle of this initial underwater section.

Navigating the Currents and Hidden Paths

The sewer's strong currents are a major obstacle. Use your flutter jump to maintain control and aim your egg throws carefully.

Hidden Area (Life-Up Heart): After collecting Character Coin 1, continue right. You'll notice a small, seemingly inaccessible alcove on the ceiling. Throw an egg upwards to hit a hidden Winged Cloud, which will drop a Life-Up Heart.
Winged Cloud 2: Further to the right, as the current picks up, you'll see another Winged Cloud. Hit it for 50 Coins.
Wonder Wool 2: Just past Winged Cloud 2, there's a section where the current pushes you upwards. Look for a breakable wall on the left. Throw an egg to destroy it and reveal a secret passage containing Wonder Wool 2.
Mid-Point Bell: You'll soon reach a solid platform with the Mid-Point Bell. Hit it to save your progress.

The Naval Piranha Gauntlet

The second half of the stage introduces more aggressive Naval Piranhas and more complex water puzzles.

Character Coin 2: From the Mid-Point Bell, drop into the water below. Swim left against a strong current. You'll need to flutter jump and egg-toss simultaneously to avoid enemies and reach a small platform on the left where Character Coin 2 awaits.
Wonder Wool 3: Head back right, past the Mid-Point Bell's platform. You'll encounter a series of rising and falling water levels. Time your movements carefully. In a section where the water level is high, look for a visible red pipe on the ceiling. Jump and flutter into it to find a hidden room with Wonder Wool 3.
Winged Cloud 3: After exiting the hidden room, continue right. You'll face several Naval Piranhas in a narrow passage. A Winged Cloud is positioned strategically to be hit by an egg, yielding 50 Coins.
Character Coin 3: Following Winged Cloud 3, you'll enter a large open area with multiple Naval Piranhas circling. The Character Coin 3 is located near the bottom-right corner of this area, often guarded by a particularly large Naval Piranha.

Final Stretch and Boss Prep

The end is in sight, but don't let your guard down!

Wonder Wool 4: After the large open area, you'll see a series of platforms leading upwards. Instead of going up immediately, look for a submerged passage to the far right. Swim through it to find Wonder Wool 4.
Winged Cloud 4: As you ascend the platforms, a final Winged Cloud will be visible near the top, offering 50 Coins.
Character Coin 4: Before the final pipe, you'll see a small waterfall. The Character Coin 4 is hidden behind this waterfall. You'll need to jump and flutter behind the water curtain to grab it.
Wonder Wool 5: Just before the green pipe leading to the boss door, there's a small, elevated platform. Jump onto it and Ground Pound the fabric to reveal the final Wonder Wool 5.

With all collectibles in hand, proceed through the green pipe to confront the boss of World 4!