Wuhu Island

Wuhu Island is a large, tropical, tourist-filled island, inhabited by Miis and located in the Pacific Ocean that appears in some popular Nintendo games, including Wii Fit, Wii Fit Plus, Wii Sports Resort, and Pilotwings Resort. It also appears in Mario Kart 7.

Mario Kart 7
This 3DS game has two tracks the player rides on Wuhu. The tracks include Wuhu Island Loop, which has the drivers race around the entire island and Maka Wuhu (Wuhu Mountain Loop), which has the drivers race around and inside Maka Wuhu, the volcano on the island. A Battle Stage, Wuhu Town, is also present, which allows the drivers to battle all around the town area of the island. However, it is not possible to drive over to the separate tiny village known as New Town. The Island Loop track takes place in the day, and the Maka Wuhu takes place in the evening, while Wuhu Town takes place at night.

Wii Fit & Wii Fit Plus
In Wii Fit, 8-bit sprites of Mario and Luigi can be spotted around Wuhu while playing the jogging minigame. On a few occasions, a Goomba, Koopa, Mushroom or Star sprite may also appear along the side of the trail.

Wii Sports Resort
In Wii Sports Resort, while playing the Island Flyover event, one can hear the Super Mario Bros. theme by flying near the Hillside Cabins area. The name of a ship in this game, the Queen Peach, is based on Princess Peach.

Pilotwings Resort
Similar to Wii Sports Resort, in Pilotwings Resort, while flying next to New Town at night, the Super Mario Bros. theme can be heard. The nighttime description of the town states that one of the dwellers inside is playing the game on the classic NES.

Trivia

 * Wuhu Island was originally known as "Wiifity Island" in Wii Fit. It was later renamed in Wii Sports Resort.