Debuting in 1989 with the cut-and-paste ragga-terrorism of "Fire When Ready," Phatz and Bonez followed with the 1991 single "Narramine." Intersplicing the sweet soulful vocals of Sharon Williams with blistering breakbeat ragga, the single became a major mover on the hardcore techno scene. Along with "Mr. Kirk" by 4hero, Genaside II defined the growing move towards darkness in hardcore, years before drum'n'bass emerged overground. Despite additional singles like "Hellraiser" (recorded with Ray Keith and featuring a beat later borrowed by Prodigy for "Firestarter"), personal problems kept the duo out of commission for several years.
By 1995, Phatz and Bonez had sorted things out and even signed to the major-label-connected Internal. After a live date with the New Power Generation, mutual friends introduced the duo to the Wu-Tang Clan while in America. As a result, Genaside II's 1996 debut album New Life 4 the Hunted featured Wu associate Cappadonna as well as Eek-a-Mouse and Rose Windross. Ad Finite followed in 1999.
Genaside II went quiet after the release of the Return Of The Redline Evangelist in 2002. Their influence on Breakbeat Hardcore and later, Drum & Bass is undeniable.