The Cataract Seal is a key item that appears in Wario: Master of Disguise.
The Cataract Seal is a teal key that, according to Wario, has a jagged design.
The Cataract Seal is one of for keys that can be found in Ancient Waterworks. This key can be found in a purple treasure chest located on the third-highest floor of the level which can be accessed by using Cosmic Wario's laser to activate a switch. The Cataract Seal can then be used on a picture that can be found in the center waterfall.