The September 2000 issue of Nintendo Power contains a "Nintendo Power Online" section on page 12, featuring an article titled "Mamma Mia! It's Waluigi!" The accompanying text introduces Waluigi to readers, reveals that he has his own website: www.waluigi.com, and claims to have an upcoming online game called "Waluigi's Toenail Clipping Party".

At the time of the Nintendo Power issue's release, www.waluigi.com was identical to the official website for Mario Tennis, www.mariotennis.com. One of the files hosted on the Mario Tennis website was the Adobe Flash file "toenails_coming.swf", which is an advertisement for the game instead titled "Waluigi's Foot Fault" depicting him showing his bare feet and unkempt toenails (he also occasionally blinks). Another file hosted on the website was "toenails.swf", which was supposedly the game itself. Catalogued alongside this file are two additional .swf files named "paint_the_lines" and "deface_painting", which could be evidence of other Flash games hosted on the Mario Tennis website.

However, the waluigi.com domain has since been turned into a redirect to the official Nintendo website. The toenails.swf file was not preserved, and as of 2023 has not resurfaced.