Red Coin Field

The Red Coin Field, also called Pipe Down #1 , is a secret minicourse in the game Super Mario Sunshine. It is accessed in the northwest of Delfino Plaza via Warp Pipe. Although it is possible to reach the pipe with the Hover Nozzle, Turbo Nozzle, or Yoshi by jumping on the high trees leading up to the pipe, it is easiest to get there with the Rocket Nozzle.

Once inside the pipe, Mario must collect the eight Red Coins throughout the field:
 * One Red Coin is on a brown structure.
 * Mario can obtain another four coins by defeating the two Sanbo Heads and two Seedy Pods that pop out of the dense grass.
 * There is a Pianta that has caught on fire and is frantically running around the area; once Mario puts out the flames on him, he is rewarded with a red coin.
 * At the top of the level, Mario can find a red bird. This bird will drop a red coin when doused enough with F.L.U.D.D..
 * There is a watermelon block placed next to a square hole near the edge of the field. Ground Pounding it or simply jumping into the hole results in discovering a secret alcove in the field where the last red coin resides.

Mario will then be able to get to the Shine Sprite.

Trivia

 * It is impossible to refill F.L.U.D.D. here, as there is no source of water. As such, Mario must exit the level and retry if he runs out of water and wishes to try again.
 * The red bird found here is dubbed the by a Pianta ornithologist. It is the only red bird in the game.
 * The Pianta ornithologist has a completely unique voice clip that is not used by any other Pianta in the game.
 * In the Japanese version of the game, the game will crash if 100 coins are collected. It is possible to collect 100 coins in the Red Coin Field by collecting 96 to 99 coins in Delfino Plaza before entering the secret level, and then entering the Red Coin Field and collecting coins from one of the two Pokey Heads after spraying it into a wall. Spraying it into a wall makes it produce two yellow coins alongside one red coin; merely stomping on it will make it only produce one red coin.
 * There is a large, stationary flame in the level that will eventually be put out if Mario sprays it with a great amount of water. Doing so will greatly exhaust F.L.U.D.D.'s supply; however, the flame serves no real purpose and does not hide anything.
 * It is possible to knock the Sanbo Heads off the field, resulting in Mario being unable to get their red coins and having to redo the level.