How to unlock Reshiram
There is no direct purchase for Reshiram. It appears on the Unova banner inside the 5★ pool. The 5★ band takes 1.5% of all pulls and holds 103 partners, so one specific Reshiram works out to about 0.0146% per draw. The 70-pull pity counter guarantees a 5★, but it does not target Reshiram specifically, so a guarantee can still resolve to another 5★. A duplicate Reshiram refunds 300 coins at the 5★ rate.
Reshiram stats and rank
The sheet lists Reshiram at 115 HP, 116 speed, ×1.52 attack, ×1.36 physical and ×1.52 special, with 100 defense and 120 special defense — 680 base-stat total. On the three-stat percentile this is 87.0 out of 100, which puts Reshiram at rank 32 of 966 and in tier S. Relative standing explains more than the total here: its strongest slot is special multiplier (99th percentile) and its weakest is speed (75th percentile), so it spreads its value fairly evenly.
Best moves in Reshiram's pool
At move level 5 the pool is led by Fire Spin at 33.6 damage per 0.30s (170.4 effective DPS, ×1.52 multiplier), then Dragon Claw at 48.3 damage per 0.39s (168.4 effective DPS, ×1.36 multiplier), then Body Slam at 75.6 damage per 0.71s (144.3 effective DPS, ×1.36 multiplier). 9 of its 18 damaging moves scale with the physical multiplier and 9 with the special one, alongside 5 support moves. Its special multiplier is the higher of the two (×1.52 against ×1.36), so special moves convert better. The top option beats the second by 2.0 DPS, which decides slot one and leaves slot two as a judgement call.
Evolution cards for Reshiram
Its starting move, Dragon Rage, evolves into Draco Meteor once the move is at level 5 and you hold the Power card, which boosts attack for that run. A level 5 move without Power in the run is still just a level 5 move. 18 of its 23 moves carry an evolution card, across 6 distinct cards (Vigor, Sprint, Power, Reflexes, Armor and Synthesis). The strongest of them is Fire Spin at 170.4 effective DPS, so that is the one worth holding a card for first.
Reshiram compared to similar partners
The two closest stat lines in the roster are Palkia (-5 HP, +4 speed, same attack multiplier, +0 total) and Dialga (+0 HP, +0 speed, same attack multiplier, +0 total). Against Palkia, Palkia is 4 speed faster and the two carry an identical ×1.52 attack multiplier, and the rank gap is 6 places. The exchange rate is the point: nothing here improves on both lines at once, so neither side is a strict upgrade and the move pools have to break the tie.