Absol is probably influenced by the Bai Ze of Chinese mythology. The Bai Ze is described to be white in appearance and has one or two horns on it's head. It is considered to be a very intelligent beast, since it has the ability to understand human speech and about 11,520 types of supernatural creatures in the world.
Absol may also have taken inspiration from death, a deity who wields a scythe that is often linked to destiny and disaster. It also shares the classic black cat superstition in some of it's PokéDex entries.
Absol is very popular amongst many fans, despite having a hard time being usable in battle.
Most fans are very fond of it's great design and ability to foresee impending doom.
Absol also received a Mega Evolution in Generation 6. While it is very situational, Mega Absol has improved Speed, enabling it to outrun a good chunk of threats. It even has access to a very diverse offensive movepool with attacks such as Fire Blast, Sucker Punch, Play Rough, Megahorn, and Ice Beam. Mega Absol has the right amount of power to take advantage of it's diverse attacking movepool.