Hisui came very early to the use of stone tools, and clung to them long after their neighbors had taken up metalworking, because of the abundant and useful rocks supplied by Kleavor. Not only do a Kleavor's stone axes typically outlive their owner – at worst, one ax of the two will be chipped or broken – but the rocks these pokemon hurl at their opponents in combat often found a second life as adzes or scrapers in human hands. A complete toolkit could be expensive to manufacture and heavy to carry when on the move; a pet Kleavor had no such weakness. Scyther's evolution was always difficult to capture or tame, and anyone capable of doing so in an era before even wooden pokeballs was considered a worthy leader of their respective clan, in an undoubtedly Paleolithic tradition which survived down to historic times.

Kleavor could not, unfortunately, compete with their fellow evolution of Scizor, whose shining metal coat struck both colonists and assimilating clan members of the early Sinnoh period as a symbol of civilization – and the fact that they lost a series of highly publicized one-on-one bouts surely did not help their popularity; Scyther trainers declared Scizor the stronger evolution. Kleavor's numbers in the wild were also decimated by the mining of Black Augurite to construct munitions. The hereditary warden in this period submitted to Scizor's superiority, catching one for himself and refusing to search for a replacement when the last Noble Kleavor passed away.

There is no reason in principle why a Kleavor could not be made today; Sinnoh's Black Augurite mines may have been tapped out, but modern Scyther have the same biology as their ancestors. Whenever people miss what was lost in Hisui badly enough to obtain Black Augurite from abroad, Kleavor shall surely return...