There is one Hisuian verse that tells of a powerful light creating a deep shadow. I imagine that this deep shadow is Giratina.
Giratina is a Ghost/Dragon-type Pokémon. It takes double damage from Ice, Ghost, Dragon, Dark and Fairy, resists six types, and is immune to Normal and Fighting. Its base stats add up to 680: the highest is HP (150) and the lowest is Speed (90).
It does not evolve, and no other Pokémon evolves into it. Its ability is Pressure, and its Hidden Ability is Telepathy. It cannot breed: it is in the Undiscovered egg group. In Scarlet and Violet it learns 14 moves by level-up and 51 by TM.
OTHER FORMS
Giratina Origin Forme
Ghost / Dragon type, like Giratina; Attack 100 → 120, Defense 120 → 100, Sp. Atk 100 → 120, Sp. Def 120 → 100; ability Levitate.
BASE STATS
ABILITIES
BREEDING
MOVES
WEAKNESSES & RESISTANCES
EVOLUTION LINE
This Pokemon does not evolve