when it comes to typing, it will be at least half dark (primary most likely). The secondary type is a toughie.
It can be fire since hell has fire.
It can be psychic since the use of psychics/hex/witchcraft is forbbiden and sinful in some religions.
It can be ghost since evil spirits are ghosts in general.
It can be flying since some illustrations of devils and demons have wings.
It can be normal since in the Bible, those humans who choose to be on the side of the Devil carry a 666 imprinted on their skin (along with all the demons and followers) and the pokemon type that is closests to human are the normal type because they resemble mammals. It might resemble a demonic human-like pokemon? Like in the movie the omen, where Damien is the son of the Devil and carries a 666 on his skin.
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They didn't do anything special for 4, 13, 42, 44, 108, 444, or 616, so what makes you think they'll do something for 666?
I get 4, 13, 44 and 444. But please explain the others.
42- Meaning of life, the universe, and everything. 108- Occurs a lot in Buddhist tradition. 616- Alternative to 666.
Actually, Spiritomb was #108 in the Sinnoh Dex, it's composed of 108 spirits, its weight is 108,0 kg and it has 108 base on its two defense stats. So they did something special for this number, but not in the National Dex.
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