Manhole

Manholes are holes that are located in various places in Super Mario Sunshine. Most are found in the Delfino Plaza, but some appear in other levels, such as Ricco Harbor. Manholes lead to the intricate underground sewer system, and can lead Mario to places he cannot access aboveground. To access it, Mario must Ground Pound on a manhole. The manhole covers, which have a sun on them originally, when ground-pounded, will flip, revealing a moon. A manhole cover can also be seen in the Delfino Plaza stage in Super Smash Bros. Brawl but it serves no purpose.