Submerged Castle

The Submerged Castle has the Waterwraith, one of the most dreaded and feared enemies in the series. It is a dungeon in the Perplexing Pool in both Pikmin 2, and Pikmin: The Pollution.

In Pikmin: The Pollution
It has 5 floors, with the Waterwraith battled in the 5th one, and will drop from the ceiling on the other floors, after 3 minutes.

Enemies
Smoky Progg - Floors 1,2,3,4

BOSS Waterwraith - Floors 1,2,3,4,5

Items
4 De-Pollutionater Parts - Laying around on Floors 1 through 4

De-Pollutionater Part - Dropped by Waterwraith

Pellets
30 Blue - Waterwraith

Strategy
You can only have Blue and Green pikmin in here.

VERY EASY

The easiest way through is by letting the Waterwraith on each floor kill green Pikmin. The Boss Waterwraith, like all other bosses, are unaffected, so make them purple ones with the candypop bud on its floor.

EASY

Another strategy is to quickly have one captain get the exit ready, while the other gets the De-Pollutionater part.

MEDIUM

When the Waterwraith appears, have one captain bait it, while the other works.

HARD

Get both captains on the part, then get to the exit.

In Pikmin E
In Pikmin E, Submerged Castle appears exactly as it does in Pikmin 2, and even has the Waterwraith. However, the Waterwraith spawning in has become much more common, to the point where there can be two or more at once. This area is no longer a cave, but a Mission Mode Level, unlocked along with 4 others after completing the main story 100%.