How to unlock Giratina
There is no direct purchase for Giratina. It appears on the Sinnoh banner inside the 5★ pool. The 5★ band takes 1.5% of all pulls and holds 103 partners, so one specific Giratina works out to about 0.0146% per draw. The 70-pull pity counter guarantees a 5★, but it does not target Giratina specifically, so a guarantee can still resolve to another 5★. A duplicate Giratina refunds 300 coins at the 5★ rate.
Giratina stats and rank
The sheet lists Giratina at 138 HP, 116 speed, ×1.25 attack, ×1.25 physical and ×1.25 special, with 120 defense and 120 special defense — 680 base-stat total. On the three-stat percentile this is 79.1 out of 100, which puts Giratina at rank 82 of 966 and in tier A. Relative standing explains more than the total here: its strongest slot is HP (99th percentile) and its weakest is attack multiplier (63rd percentile), so it is a specialist rather than an all-rounder.
Best moves in Giratina's pool
At move level 5 the pool is led by Dragon Claw at 48.3 damage per 0.39s (154.8 effective DPS, ×1.25 multiplier), then Body Slam at 75.6 damage per 0.71s (132.6 effective DPS, ×1.25 multiplier), then Tackle at 33.6 damage per 0.38s (112.0 effective DPS, ×1.25 multiplier). 9 of its 16 damaging moves scale with the physical multiplier and 7 with the special one, alongside 5 support moves. Its physical and special multipliers are identical at ×1.25, so the pool decides the build. The top option beats the second by 22.2 DPS, which decides slot one and leaves slot two as a judgement call.
Evolution cards for Giratina
Its starting move, Shadow Ball, evolves into Phantom Force once the move is at level 5 and you hold the Reflexes card, which boosts cooldown for that run. If Reflexes never appears in that run's level-up offers, the move stays at level 5 and unevolved. 16 of its 21 moves carry an evolution card, across 6 distinct cards (Vigor, Sprint, Power, Reflexes, Armor and Magnet). The strongest of them is Dragon Claw at 154.8 effective DPS, so that is the one worth holding a card for first.
Giratina compared to similar partners
The two closest stat lines in the roster are Zygarde (-19 HP, +2 speed, same attack multiplier, -80 total) and Mew (-23 HP, +4 speed, same attack multiplier, -80 total). Against Zygarde, Zygarde is 2 speed faster and the two carry an identical ×1.25 attack multiplier, and the rank gap is 1 places. Those differences are what you actually trade when swapping partners, not a straight upgrade path, so neither side is a strict upgrade and the move pools have to break the tie.