Bikko. The rarest waifu on earth.
Click me! ↓ 
Bikko. The rarest waifu on earth.
Click me! ↓
Bikko/ビっ子 made her debut appearance as the main character in a doujinshi called "Kesson Shoujo" by Yoshida On, or better known as [ROMANTIC FOOL since 1995], back in 2004. She became a hot topic in the waifu threads of the more exotic pre-Reddit imageboards, especially gurochan and 420chan, where she gained most of her popularity.
Her manga was like all doujins, a limited print, and was lost to time. For 15 years, anons have been searching high and low for scans of the original manga so we could finally find the answer to the one question that haunts Bikko's existence: "Source??"
In 2004, Yoshida posted illustrations of his punk-rock amputee smoker girl called "Bikko" on his website, rf1995.com (404). He was promoting a joint doujin with another artist called Rakugaki-san which they were gonna sell later that February, Bikko being the main character of said doujin. People liked her, so he drew more about her. The users of the Japanese imageboard 2Channel were desperate to find out about Bikko and her doujin. Fortunately, Yoshida found out about this and made a character profile on his blog-website where he discussed Bikko and the inspiration for her creation.
Here's a snapshot of Yoshida's old blog-website when Bikko first appeared: (☞*∀ﾟ)☞
The earliest thread about Bikko was found in a 343-post thread starting from September 15, 2005, all the way to July 28, 2007. Pretty sure it wasn't the first Bikko thread though. Scroll through the wastes of Elfen Lied Torture Threads and Sailor Moon Scat Fanart for long enough and you'll find Bikko, untouched and un-guro’d. Ironically, they'd hate it whenever someone posted a lewd image of her in the thread.
420chan loved Bikko-san so much that they made her one of the main mascots of their /nc/ board, along with a stoner girl with a giant bong called TCC-tan, a maid addicted to uppers called Yakui and a mentally challenged Jigglypuff.
Most boards on 420chan had an anime girl mascot. /weed/ had “TCC-tan,” /wooo/ had “/wooo/-tan,” and /smoke/ had Bikko. As of now, /smoke/ has been separated into /vape/ and /tobacco/.
Bikko was briefly mentioned in comparison in Damaged Goods, one of the older and more popular 4chan stories about a nurse who meets a girl who was severely injured and orphaned in a car accident, and the slow development of their father/daughter relationship.
Around the time of Damaged Goods, a bunch of 4chan nerds started creating the first major English-language visual novel, Katawa Shoujo, which featured disabled girls as the lead heroines. People lobbied to get Bikko in the game, even a cameo, but that didn't happen for unknown reasons.