I honestly can't say. It seems as though some Pokemon are named after the noises they make-for example, the fairly ubiquitous Pikachu-but others are just incredibly silly.
[SAYS THE MAN WHO NAMED HIS MYSTIC CODE "MERCURY ROLLING THING" IN A DEAD LANGUAGE]
no subject
[SAYS THE MAN WHO NAMED HIS MYSTIC CODE "MERCURY ROLLING THING" IN A DEAD LANGUAGE]