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Wario's Warehouse is a series of articles that appeared on Nintendo of Europe's website from 2001 to 2003. It reappeared in July 11, 2006 with a two-part article containing cheats for New Super Mario Bros. After this, it disappeared again.
The articles were mainly there to provide players with hints and cheats, but it also divulged apparent facts about Wario and Waluigi. The following are some claims found in the articles (originally written in Wario's first-person perspective):