>>13728804>the bibleAny mention of Lucifer as the prime Satanic figure (Satan in Hebrew simply means opponent and referred to anyone that suggested God could be fallible, see Job where god makes a bet with a "Satan") was part of apocryphal writings, with the only canon reference to a Lucifer being a king of men, not an angel at all, and no reference existing to a single Satanic figure of any kind. Satan was a story made after the fact by the Catholic church to scare people into acting in accordance with their teachings, and expanded by creative writers like Dante, for example.
But yeah, Giratina is based on the hip and groovy non-canonical story about how Lucifer was god's archangel then was cast down, with its six wings, six golden spikes/legs and six ribs being a nod to this as well.