Giratina
Pokedex Information:

Base Stats:
Stat
Min
Base
Max
Tier 1
Tier 2
Tier 3
Tier 4
Tier 5
Tier 6
HP
410
150
504
ATK
184
100
328
DEF
220
120
372
SPATK
184
100
328
SPDEF
220
120
372
SPD
166
90
306
Total: 680
The Min/Max values are calculated for a Pokémon at level 100. Maximum values are based on a beneficial nature, 252 EVs, 31 IVs. Minimum values are based on a hindering nature, 0 EVs, 0 IVs.
Tiers are calculated from the Pokémon with the highest available stat for that stat. Example: Blissey has the highest base HP at 255, so all tiers are divided by 6 from 255. Whereas the highest DEF is calculated from Shuckle at 230. This shows a better representation of where a Pokémon's base stat lies compared to the highest that stat can be. The length of the stat relative to the Tier also shows where it sits inside the Tier.
Moves Learnt on Level Up
Giratina can learn these moves by leveling up.
TM moves
Giratina can learn these moves from Technical Machines.
Pokédex entries:
Altered Forme
diamond-pearl
A Pokémon that is said to live in a world on the reverse side of ours. It appears in an ancient cemetery.
platinum
It was banished for its violence. It silently gazed upon the old world from the Distortion World.
heart-gold-soul-silver
This Pokémon is said to live in a world on the reverse side of ours, where common knowledge is distorted and strange.
black-white-black-2-white-2
It was banished for its violence. It silently gazed upon the old world from the Distortion World.
x-omega-ruby
This Pokémon is said to live in a world on the reverse side of ours, where common knowledge is distorted and strange.
y-alpha-sapphire
It was banished for its violence. It silently gazed upon the old world from the Distortion World.
brilliant-diamond-shining-pearl
A Pokémon that is said to live in a world on the reverse side of ours. It appears in an ancient cemetery.
legends-arceus
There is one Hisuian verse that tells of a powerful light creating a deep shadow. I imagine that this deep shadow is Giratina.
Origin Forme
legends-arceus
Giratina loses its legs upon changing into this form. I believe this Pokémon must hail from a world where the heavens and the earth are as one, though I have no way of proving it.