Bianco Square

In Super Mario Sunshine, Bianco Square is an area of Delfino Plaza in that is home to the Grand Pianta Statue. It is possibly so named because the Color Portal entrance to Bianco Hills is located on the front of the Grand Pianta Statue, which is found directly in the center of the square. It is one of the main areas of Delfino Plaza, and is also one of the most open areas in the plaza. As the game progresses, all three of F.L.U.D.D.'s nozzles (the Hover Nozzle, the Rocket Nozzle, and the Turbo Nozzle) will all appear here, positioned directly behind the Grand Pianta Statue. When starting the game after quitting previously, Mario will usually appear in Bianco Square. In addition, Bianco Square also provides direct access to several major levels, including Bianco Hills, Ricco Harbor, and Sirena Beach, as well as providing access to Yoshi (once unlocked), and a few hidden Shine Sprites.

It is also the first area that Mario is ordered to clean the toxic Goop off of (Delfino Airstrip having already been cleaned prior). When Mario first enters the square, he is confronted with a large mass of Goop shaped like an octopus, in the center of which is a Piranha Plant in the Generator. After he has successfully sprayed and defeated the Piranha Plant in the Generator, the Goop will disappear, and the Grand Pianta Statue will reappear, triggering the first major event of the game. Shadow Mario jumps down from atop the Grand Pianta Statue, and proceeds to kidnap Princess Peach. After Mario has successfully stopped him, Shadow Mario will run back to Bianco Square, where he will paint the Color Portal to Bianco Hills on the front of the Grand Pianta Statue's base.

Trivia

 * Bianco Square can also be seen in the opening cutscene of Super Mario Sunshine; it's where the Piantas are seen dancing in front of the Grand Pianta Statue.
 * This is also the location where Shadow Mario is seen jumping around in the background in his first appearance of the game.