Disclaimer: If I owned Pokémon, only cruel Trainers would use Fissure on their opponents. But I don't!
#476 Probopass
An ancient civilization was recently discovered in the South Pacific. Its ruins were bereft of people, but overrun with gigantic Probopass.
#477 Dusknoir
It usually takes only the old and sick. However, it recently took a young, healthy man with no discernible explanation.
#478 Froslass
Disguised as a woman, it invites weary travelers into its cabin. Once they enter, it distracts them with strange tags until they are snowed in.
#479 Rotom
It is believed to hold the secret to powering a fusion reactor at feasible temperatures. It often takes control of airplanes and causes them to crash.
#480 Uxie
It must dream constantly to remember. Those who have lost their memory forget that cars or Pokémon are dangerous and end up killing themselves.
#481 Mesprit
It must hurt itself constantly to feel. Those who cannot feel lose their pain receptors and die from burns, cuts or poisons that they do not notice.
#482 Azelf
It must lie constantly to remain stoic. Those who have lost the will to live stop moving, fall over and die.
#483 Dialga
It manipulates Celebi into fulfilling its whims. It once stopped time for 23 hours and 40 minutes to destroy the army of a rival god.
#484 Palkia
Its body exists in ten dimensions. It brought a plague to an ancient kingdom to demonstrate its power over the pharaoh's lesser gods.
#485 Heatran
It creates islands by triggering volcanic eruptions. The first Team Magma used it to conceal the Cave of Origin in a volcano until it could revive Groudon but became food for the beast during the process.
#486 Regigigas
It fell from the sky one day but was unharmed by the impact. Ferroseed attempt to reactivate it but have so far been unsuccessful.
#487 Giratina
It drifts through space, seeking matter to annihilate. Arceus cast it to the outer darkness in ancient times to suppress its cult.
#488 Cresselia
Desert nomads honored it with sacrifices under the full moon. Even after its worship as a god was suppressed, people prayed to it as an exalted intercessor.
#489 Phione
A stunted, infertile shell of its parent. Somehow aware that it is a biological failure, it wanders the seas in loneliness, not caring if it dies during its travels.
#490 Manaphy
Its unearthly lights terrify sailors at night. Those who have been subjected to its Heart Swap report constant paranoia that they are not really themselves.
#491 Darkrai
It induces horrific nightmares to subdue its prey. Humans who experience these phantasms often become addicted to anti-sleep medications so they never have to repeat the experience.
#492 Shaymin
A nature god that bestows blessings upon those filled with gratitude. However, it grants boons even to those who feel grateful as a result of schadenfreude.
#493 Arceus
A vengeful god that kills those who worship other deities. It appears to humans as a shower of golden rain; to look upon its true form is death.
#494 Victini
With every victory comes a defeat for those who fought on the losing side. It immolates its fallen opponents to ensure that their failure is eternal.
#495 Snivy
A smug Pokémon favored as a pet by millionaires. If its fragile pride is wounded, so will be those who hurt it.
#496 Servine
A stealthy, predatory worm lizard which occupies a similar ecological niche to extinct deinonychosaurs. It slithers into strike position before pursuing its prey on foot.
#497 Serperior
A massive python with crushing coils historically favored by royalty. Kings kept them in their dungeons and fed them live traitors.
#498 Tepig
Although its meat has traditionally been considered unclean, it is now eaten in many areas. It often carries dangerous roundworms.
#499 Pignite
A man crossed a stream in the evening and wrestled a Pignite until morning. When the man finally emerged victorious, the Pignite revealed that it was actually Arceus.
#500 Emboar
A monstrous Emboar was sent to ravage the countryside by a vindictive Champion. A group of over 40 Trainers was required to subdue and kill it.