I have come up with Fae-realm version of pokemon, so I started to think what other kinds of Magical Realm Variants I could come up with. If their are Fae pokemon what about Fiend Pokemon?
In my setting the Distortion Ream is treated as a sort of Hellish Realm but Giratina themself is not Evil incarnate, they are Chaos incarnate. They are defiant, anarchic, and chaotic, but not out of malice; Giratina is the antithesis of Order, Tradition and Authority, they seek to spur other pokemon question authorities, encourage pokemon to advocate for themself as individuals instead of being part of a collective, and keep the world from becoming too stagnant. Giratina also made themself the Patron Lord of all those who feel lost, marginalized groups, individuals questioning their identities, and those who choose to go against societal and traditional expectations to choose their own fate.
Still, many pokemon (Particularly ones who are part of upholding Authority, Traditions, and Societal norms) have interpreted Giratina's actions as Evil, and it's not like there are not plenty of the instances where Giratina's actions haven't had destructive consequences on the mortal world.

While Giratina is not Evil, the Distortion world has become the dumping realm for punishing evil souls, which Giratina hates. They generally wants pokemon to leave them alone, so they have come up with Distortion Variant Pokemon (also known as Demon Pokemon or Feind Pokemon) to deal with the Evil Souls. However over time their purpose has become corrupted; The Distortion Realm was meant to embody Pure Chaos, but a large and expanding portion of the Realm has become the Pit of Evil which has become a Authoritarian, Bureaucratic, Caste system nightmare which Giratina hates more than anything and will frequently just attack relentlessly to beat out their frustrations

Distortion Buizel: Steel/Poison type. They represent Pollutants in the water