Diamond City

Diamond City is a city appearing in the WarioWare series. Wario claims that it is "his city" that he has made into a "sparkling gem of a metropolis." Here, Wario and his friends have parties, and most of them are resided here.

Location
It isn't clearly known where Diamond City is located. The WarioWare series suggests that the city is possibly located on Earth instead of the Mushroom World, where Wario comes from (mostly from various statements made by the alien Orbulon). A map of Earth that can be seen in Wario's House would seem to support this assumption. However, the Diamond City race course in Mario Kart Arcade GP features symbols known from the Mushroom World, such as E. Gadd's logo and Magic Paintbrushes, indicating that it might be somewhere in the Mushroom World.

In WarioWare: Twisted!, it can be seen that Diamond City is located on an island.

Areas in Diamond City

 * 9-Volt's House
 * Ashley's Mansion
 * Castle
 * Club Spice
 * Club Sugar
 * Diamond Academy
 * Diamond Broadcasting System
 * Diamond Dojo
 * Diamond Elementary
 * Diamond Kindergarten
 * Diamond Knoll
 * Diamond Taxi
 * Dr. Crygor's Lab
 * Dr. Payne's Dental Clinic
 * Gelateria
 * Hawt House
 * Kat and Ana's House
 * Mona Pizza
 * Pizza Dinosaur
 * Sora Sora
 * Temple of Form
 * The Sweet Spot
 * Tomorrow Hill
 * Toy Express
 * Wario's House
 * WarioWare, Inc.

Mario Kart series
Diamond City is also a course in Mario Kart Arcade GP and Mario Kart Arcade GP 2.

Despite the fact that E. Gadd doesn't appear in the Diamond City-based WarioWare games, his logo can be seen in the background of the course, which appears to house Gadd Science, Inc. Several Magic Paintbrushes, one of E. Gadd's inventions, are also on display on this course.