Diamond Software is an entertainment company introduced in WarioWare: D.I.Y.. The company publishes microgames, comics and records. Prior to WarioWare: D.I.Y., Mona, Jimmy T., Ashley, Orbulon and 9-Volt left WarioWare. Inc to work for Diamond Software. According to the D.I.Y. Forum feature, Manager Joe runs the company.
Dimaond Software's microgame sets/records/comics have their own category in the D.I.Y. Shop portion of the game and encapsulate most of the premade content of WarioWare: D.I.Y. The character sets and comics are unlocked based on the ingame clock, while records are unlocked by completing achievements.