Gyarados (Shadow): Master League IV Guide

How far your IVs can slip before this Master League attacker gives up specific matchups, using its standard Master League moveset. Breakpoints, bulkpoints, CMP, and named matchups across the full best-buddy grid, over all 9 ordered shields, your-opp (0-0 .. 2-2).

Format credit: the structure, terminology, and presentation of this guide are adapted from XehrFelrose's Master League IV deep dives. In particular the "Terms to know" vocabulary (including the "Premium" vs "Thrifty" IV framing), and the per-stat by best-buddy by shield breakdown, follow XehrFelrose's work. The numbers here are independently re-simulated with this project's own engine, not taken from the video.

What this covers

Terms to know

Breakpoint
An attack-stat threshold where your fast move deals 1 more damage to a specific opponent. Most impactful on fast moves that fire every turn.
Bulkpoint
A defense-stat threshold where a specific opponent's fast move deals 1 less damage to you.
CMP (charge-move priority)
When both Pokemon throw a charged move on the same turn, the one with the higher attack stat goes first. "CMP lost" means a lower attack IV drops you below an opponent's attack, so you would lose that simultaneous-throw.
Shields (you-opp)
Shield scenarios are written you-opp (your shields first). This guide covers all 9 ordered scenarios (0-0, 0-1, 0-2, 1-0, 1-1, 1-2, 2-0, 2-1, 2-2), so "you 2 / opp 1" (2-1) is distinct from "you 1 / opp 2" (1-2). Even energy, standard movesets.
BB (best buddy)
Best-buddy boost adds one level (L50 to L51). In Master League there is no CP cap, so that level fully applies.
Premium vs Thrifty IVs
Terminology from XehrFelrose (video). Defined here mechanically, not as a gameplay call: a Premium spread drops no matchups versus a perfect (hundo) IV spread in the stated case; a Thrifty spread drops only the matchups listed next to it. Whether those matchups matter is your call.

These terms and the breakdown that follows are adapted from XehrFelrose's Master League IV deep dives.

The build

This guide assumes Gyarados (Shadow) with its standard Master League moveset. Base stats atk 237 / def 186 / hp 216.

Check my IVs

Paste one or more candidate spreads as atk/def/hp (for example 15/15/14, 15/14/15), and this builds a PvPoke-style matchups table showing only the matchups where those spreads differ. Spreads that agree everywhere are hidden, so the table stays scannable. This guide covers IVs 15 down to 12; the richest close-call detail is on spreads that drop a single stat. Enter two or more spreads and you also get a leftover-HP margin view (how much more convincingly each wins) and a ✦ marker for matchups that flip when you toggle your own best-buddy (L50 ↔ L51) in the selected Case.

Versus the Master League meta

Win/loss at a perfect IV on the 3 even shields (0-0, 1-1, 2-2), in the best buddy, vs a best-buddy meta case (you L51 vs opponents L51), vs the 61-strong Master top-60. The full per-shield picture is in the stat tables below.

Shield-dependent (split on even shields): Palkia (Origin), Metagross, Kyurem (White), Lunala, Reshiram, Kyurem (Black), Kyogre, Zekrom, Marshadow, Eternatus, Palkia (Shadow), Metagross (Shadow), Necrozma (Dawn Wings), Ho-Oh, Latios, Kyogre (Shadow), Necrozma (Dusk Mane), Mewtwo (Shadow), Dialga (Shadow), Hydreigon (Shadow), Mewtwo, Primarina, Latias, Dragonite (Shadow), Goodra, Tyranitar (Shadow), Landorus (Therian), Gyarados, Ho-Oh (Shadow).

What best buddy changes (at a perfect IV)

Matchups best buddy (L51) gains over not best-buddying (L50), holding the meta's best-buddy status fixed. Even shields, perfect IV.

Vs a non-best-buddy meta

Gains: Gyarados (Shadow) 0-0, Gyarados (Shadow) 1-1, Gyarados (Shadow) 2-2, Keldeo (Ordinary) 1-2, Keldeo (Resolute) 1-2, Lugia 2-1, Solgaleo 0-0

Vs a best-buddy meta

Gains: Groudon (Shadow) 1-1, Groudon (Shadow) 1-2, Keldeo (Ordinary) 2-2, Keldeo (Resolute) 2-2

Attack IVs

Attack at a perfect IV: 255.6 at L51 (best buddy), 254.1 at L50. Each row drops only that one stat (the other two stay 15); matchups shown are those given up versus a perfect IV.

No best buddy, vs a non-best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14253.1Gyarados (Shadow)Reshiram (Shadow)-
13252.1Palkia (Origin), Gyarados (Shadow)Reshiram (Shadow)
12251.1Palkia (Origin), Gyarados (Shadow)Reshiram (Shadow)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
14 Atk:
  • Ho-Oh 2-2 energy banked: still wins but banks 100 less energy than a perfect 15/15/15, about one fewer charged move (now 0, was 100)
13 Atk:
  • Gholdengo 2-0 energy banked: still wins but banks 35 less energy than a perfect 15/15/15, about one fewer charged move (now 3, was 38)
  • Ho-Oh 2-2 energy banked: still wins but banks 100 less energy than a perfect 15/15/15, about one fewer charged move (now 0, was 100)
12 Atk:
  • Gholdengo 2-0 energy banked: still wins but banks 35 less energy than a perfect 15/15/15, about one fewer charged move (now 3, was 38)
  • Ho-Oh 2-2 energy banked: still wins but banks 100 less energy than a perfect 15/15/15, about one fewer charged move (now 0, was 100)
  • Latios 1-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Latios 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 1 left, was 2)

No best buddy, vs a best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14253.1--
13252.1-Landorus (Therian)
12251.1-Landorus (Therian)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
13 Atk:
  • Mewtwo 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
12 Atk:
  • Marshadow 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Mewtwo 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)

Best buddy, vs a non-best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14254.6Landorus (Therian)Latios (Shadow), Mewtwo
2-1 Lugia
13253.6Gyarados (Shadow), Landorus (Therian)Latios (Shadow), Mewtwo, Reshiram (Shadow)
12252.6Palkia (Origin), Gyarados (Shadow), Landorus (Therian)Latios (Shadow), Mewtwo, Reshiram (Shadow)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
14 Atk:
  • Latios (Shadow) 2-2 energy banked: still wins but banks 97 less energy than a perfect 15/15/15, about one fewer charged move (now 3, was 100)
13 Atk:
  • Garchomp 1-1 near-death win: still wins but barely survives, 20 HP left of 195 -- a perfect 15/15/15 keeps 110
  • Garchomp 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Ho-Oh 2-2 energy banked: still wins but banks 100 less energy than a perfect 15/15/15, about one fewer charged move (now 0, was 100)
  • Latios (Shadow) 2-2 energy banked: still wins but banks 97 less energy than a perfect 15/15/15, about one fewer charged move (now 3, was 100)
12 Atk:
  • Garchomp 1-1 near-death win: still wins but barely survives, 20 HP left of 195 -- a perfect 15/15/15 keeps 110
  • Garchomp 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Gholdengo 2-0 energy banked: still wins but banks 35 less energy than a perfect 15/15/15, about one fewer charged move (now 3, was 38)
  • Ho-Oh 2-2 energy banked: still wins but banks 100 less energy than a perfect 15/15/15, about one fewer charged move (now 0, was 100)
  • Keldeo (Ordinary) 2-2 near-death win: still wins but barely survives, 21 HP left of 195 -- a perfect 15/15/15 keeps 73
  • Keldeo (Resolute) 2-2 near-death win: still wins but barely survives, 5 HP left of 195 -- a perfect 15/15/15 keeps 65
  • Latios (Shadow) 2-2 energy banked: still wins but banks 97 less energy than a perfect 15/15/15, about one fewer charged move (now 3, was 100)

Best buddy, vs a best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14254.6Gyarados (Shadow)Reshiram (Shadow)-
13253.6Palkia (Origin), Gyarados (Shadow)Reshiram (Shadow)
12252.6Palkia (Origin), Gyarados (Shadow)Reshiram (Shadow)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
13 Atk:
  • Groudon (Shadow) 1-1 near-death win: still wins but barely survives, 5 HP left of 195 -- a perfect 15/15/15 keeps 86
  • Groudon (Shadow) 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
12 Atk:
  • Groudon (Shadow) 1-1 near-death win: still wins but barely survives, 5 HP left of 195 -- a perfect 15/15/15 keeps 86
  • Groudon (Shadow) 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)

Defense IVs

Defense at a perfect IV: 141.6 at L51 (best buddy), 140.8 at L50. Each row drops only that one stat (the other two stay 15); matchups shown are those given up versus a perfect IV.

No best buddy, vs a non-best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14140.0Dialga (Origin), Kyogre (Shadow), Groudon, Groudon (Shadow)
13139.3Dialga (Origin), Garchomp (Shadow), Kyogre (Shadow), Groudon, Groudon (Shadow)
12138.6Xerneas, Dialga (Origin), Palkia (Shadow), Garchomp (Shadow), Yveltal, Ho-Oh, Meloetta (Aria), Latios, Kyogre (Shadow), Groudon, Jirachi, Primarina, Groudon (Shadow), Ho-Oh (Shadow)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
12 Def:
  • Palkia (Shadow) 1-1 near-death win: still wins but barely survives, 21 HP left of 194 -- a perfect 15/15/15 keeps 93

No best buddy, vs a best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14140.0Garchomp (Shadow)
13139.3Xerneas, Palkia (Shadow), Garchomp (Shadow), Yveltal, Ho-Oh, Meloetta (Aria), Latios, Jirachi, Primarina, Ho-Oh (Shadow)
12138.6Xerneas, Palkia (Shadow), Garchomp (Shadow), Yveltal, Ho-Oh, Meloetta (Aria), Latios, Jirachi, Primarina, Tapu Lele, Ho-Oh (Shadow)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
13 Def:
  • Palkia (Shadow) 1-1 near-death win: still wins but barely survives, 21 HP left of 194 -- a perfect 15/15/15 keeps 93
12 Def:
  • Palkia (Shadow) 1-1 near-death win: still wins but barely survives, 21 HP left of 194 -- a perfect 15/15/15 keeps 93

Best buddy, vs a non-best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14140.9Mewtwo (Shadow)
13140.2Mewtwo (Shadow), Keldeo (Resolute), Keldeo (Ordinary)
12139.5Dialga (Origin), Garchomp (Shadow), Kyogre (Shadow), Groudon, Mewtwo (Shadow), Keldeo (Resolute), Keldeo (Ordinary), Groudon (Shadow)

Best buddy, vs a best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14140.9Dialga (Origin), Kyogre (Shadow), Groudon, Groudon (Shadow)
13140.2Dialga (Origin), Garchomp (Shadow), Kyogre (Shadow), Groudon, Groudon (Shadow)
12139.5Xerneas, Dialga (Origin), Palkia (Shadow), Garchomp (Shadow), Yveltal, Ho-Oh, Meloetta (Aria), Latios, Kyogre (Shadow), Groudon, Jirachi, Primarina, Groudon (Shadow), Ho-Oh (Shadow)
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
12 Def:
  • Palkia (Shadow) 1-1 near-death win: still wins but barely survives, 22 HP left of 195 -- a perfect 15/15/15 keeps 94

HP IVs

HP at a perfect IV: 195 at L51 (best buddy), 194 at L50. Each row drops only that one stat (the other two stay 15); matchups shown are those given up versus a perfect IV.

No best buddy, vs a non-best-buddy meta

HPHPMatchups dropped (you-opp)
14193
13192
12191
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
12 HP:
  • Annihilape 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 1 left, was 2)
  • Annihilape 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Annihilape 2-2 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)

No best buddy, vs a best-buddy meta

HPHPMatchups dropped (you-opp)
14193
13192
12191
Close calls (still a win, but the post-match margin shifts enough to matter: a shield spent, a near-death survival, or roughly one fewer charged move of energy banked)
13 HP:
  • Annihilape 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 1 left, was 2)
  • Annihilape 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Annihilape 2-2 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
12 HP:
  • Annihilape 2-0 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 1 left, was 2)
  • Annihilape 2-1 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)
  • Annihilape 2-2 shield spent: keeps the win, but has to spend 1 more shield than a perfect 15/15/15 (now 0 left, was 1)

Best buddy, vs a non-best-buddy meta

HPHPMatchups dropped (you-opp)
14194
13193
12192

Best buddy, vs a best-buddy meta

HPHPMatchups dropped (you-opp)
14194-
13193
12192

Every spread with all three IVs from 12 to 15 (the practical range above the 10/10/10 legendary catch floor), sorted so the spreads that drop nothing come first. "Premium" drops no matchups versus a perfect IV in the stated case; everything else lists exactly what it gives up. The first two tables compare against a best-buddied meta (the realistic, harder case); the last two against a non-best-buddied meta, which is strictly easier.

If you best buddy (L51), vs a best-buddy meta

CP and stats at L51; drops measured in the best-buddy vs best-buddy case.

CPIVs (A/D/HP)IV %AtkDefHPDrops vs a perfect IV
387915/15/15100.00%255.6141.6195drops nothing (Premium)
386414/15/1599.60%254.6141.6195drops nothing (Premium)
387115/15/1499.49%255.6141.6194drops nothing (Premium)
385614/15/1499.09%254.6141.6194drops nothing (Premium)
387015/14/1599.50%255.6140.9195
385414/14/1599.11%254.6140.9195
386115/14/1498.99%255.6140.9194
384614/14/1498.60%254.6140.9194
386015/13/1599.00%255.6140.2195
386315/15/1398.97%255.6141.6193
0-0 Mewtwo
384514/13/1598.61%254.6140.2195
384714/15/1398.58%254.6141.6193
0-0 Mewtwo
384913/15/1599.21%253.6141.6195
383312/15/1598.81%252.6141.6195
384013/15/1498.70%253.6141.6194
385215/13/1498.50%255.6140.2194
0-0 Mewtwo
382512/15/1498.30%252.6141.6194
383614/13/1498.11%254.6140.2194
0-0 Mewtwo
385015/12/1598.51%255.6139.5195
0-0 Mewtwo
385415/15/1298.46%255.6141.6192
0-0 Mewtwo
383213/15/1398.19%253.6141.6193
0-0 Mewtwo
383514/12/1598.12%254.6139.5195
0-0 Mewtwo
383914/15/1298.07%254.6141.6192
0-0 Mewtwo
381712/15/1397.80%252.6141.6193
0-0 Mewtwo
383913/14/1598.71%253.6140.9195
385315/14/1398.48%255.6140.9193
382412/14/1598.32%252.6140.9195
383113/14/1498.21%253.6140.9194
383814/14/1398.09%254.6140.9193
384215/12/1498.00%255.6139.5194
0-0 Mewtwo
384315/13/1397.99%255.6140.2193
384515/14/1297.97%255.6140.9192
381512/14/1497.81%252.6140.9194
382714/12/1497.61%254.6139.5194
0-0 Mewtwo
382814/13/1397.60%254.6140.2193
383515/13/1297.48%255.6140.2192
382913/13/1598.22%253.6140.2195
381412/13/1597.83%252.6140.2195
382413/15/1297.68%253.6141.6192
382914/14/1297.58%254.6140.9192
383415/12/1397.50%255.6139.5193
380812/15/1297.29%252.6141.6192
382014/13/1297.09%254.6140.2192
382113/13/1497.72%253.6140.2194
380612/13/1497.32%252.6140.2194
381814/12/1397.11%254.6139.5193
382515/12/1296.99%255.6139.5192
382013/12/1597.73%253.6139.5195
382213/14/1397.70%253.6140.9193
380512/12/1597.33%252.6139.5195
380712/14/1397.31%252.6140.9193
381213/12/1497.22%253.6139.5194
381313/13/1397.21%253.6140.2193
379612/12/1496.84%252.6139.5194
379812/13/1396.82%252.6140.2193
381014/12/1296.61%254.6139.5192
381413/14/1297.19%253.6140.9192
379912/14/1296.81%252.6140.9192
380513/13/1296.71%253.6140.2192
378912/13/1296.32%252.6140.2192
380313/12/1396.72%253.6139.5193
378812/12/1396.34%252.6139.5193
379513/12/1296.22%253.6139.5192
378012/12/1295.84%252.6139.5192

If you do not best buddy (L50), vs a best-buddy meta

CP and stats at L50; drops measured in the no-best-buddy vs best-buddy case.

CPIVs (A/D/HP)IV %AtkDefHPDrops vs a perfect IV
383415/15/15100.00%254.1140.8194drops nothing (Premium)
381814/15/1599.60%253.1140.8194
382415/14/1599.50%254.1140.0194
0-0 Mewtwo
380313/15/1599.21%252.1140.8194
382515/15/1499.48%254.1140.8193
0-0 Mewtwo
380914/14/1599.11%253.1140.0194
0-0 Mewtwo
378812/15/1598.81%251.1140.8194
381014/15/1499.09%253.1140.8193
0-0 Mewtwo
381515/13/1599.00%254.1139.3194
0-0 Mewtwo
381615/14/1498.99%254.1140.0193
381715/15/1398.97%254.1140.8192
379413/14/1598.71%252.1140.0194
0-0 Mewtwo
380815/14/1398.48%254.1140.0192
379513/15/1498.69%252.1140.8193
379914/13/1598.61%253.1139.3194
0-0 Mewtwo
380114/14/1498.60%253.1140.0193
380214/15/1398.58%253.1140.8192
380515/12/1598.51%254.1138.6194
380615/13/1498.49%254.1139.3193
377912/14/1598.32%251.1140.0194
0-0 Mewtwo
379214/14/1398.09%253.1140.0192
378012/15/1498.30%251.1140.8193
378413/13/1598.22%252.1139.3194
378613/14/1498.20%252.1140.0193
378713/15/1398.18%252.1140.8192
379014/12/1598.12%253.1138.6194
379114/13/1498.10%253.1139.3193
379715/12/1498.00%254.1138.6193
379815/13/1397.98%254.1139.3192
377713/14/1397.70%252.1140.0192
380915/15/1298.45%254.1140.8191
379915/14/1297.96%254.1140.0191
376912/13/1597.83%251.1139.3194
377012/14/1497.81%251.1140.0193
377212/15/1397.79%251.1140.8192
377513/12/1597.73%252.1138.6194
377613/13/1497.71%252.1139.3193
378214/12/1497.61%253.1138.6193
378314/13/1397.60%253.1139.3192
376212/14/1397.30%251.1140.0192
379414/15/1298.06%253.1140.8191
378414/14/1297.58%253.1140.0191
376012/12/1597.33%251.1138.6194
376112/13/1497.32%251.1139.3193
376713/12/1497.22%252.1138.6193
376813/13/1397.21%252.1139.3192
377813/15/1297.67%252.1140.8191
378815/12/1397.49%254.1138.6192
379015/13/1297.47%254.1139.3191
376913/14/1297.19%252.1140.0191
375212/12/1496.83%251.1138.6193
375312/13/1396.82%251.1139.3192
376312/15/1297.28%251.1140.8191
377314/12/1397.11%253.1138.6192
377514/13/1297.09%253.1139.3191
375412/14/1296.80%251.1140.0191
375813/12/1396.72%252.1138.6192
376013/13/1296.70%252.1139.3191
378015/12/1296.98%254.1138.6191
374312/12/1396.33%251.1138.6192
374512/13/1296.31%251.1139.3191
376514/12/1296.60%253.1138.6191
375013/12/1296.21%252.1138.6191
373512/12/1295.83%251.1138.6191

If you best buddy (L51), vs a non-best-buddy meta

CP and stats at L51; drops measured in the best-buddy vs no-best-buddy-meta case.

CPIVs (A/D/HP)IV %AtkDefHPDrops vs a perfect IV
387915/15/15100.00%255.6141.6195drops nothing (Premium)
386414/15/1599.60%254.6141.6195
2-1 Lugia
387015/14/1599.50%255.6140.9195
387115/15/1499.49%255.6141.6194
386115/14/1498.99%255.6140.9194
386315/15/1398.97%255.6141.6193
385414/14/1599.11%254.6140.9195
2-1 Lugia
385614/15/1499.09%254.6141.6194
2-1 Lugia
384614/14/1498.60%254.6140.9194
2-1 Lugia
384714/15/1398.58%254.6141.6193
2-1 Lugia
385315/14/1398.48%255.6140.9193
386015/13/1599.00%255.6140.2195
385215/13/1498.50%255.6140.2194
383814/14/1398.09%254.6140.9193
2-1 Lugia
384913/15/1599.21%253.6141.6195
2-1 Lugia
384514/13/1598.61%254.6140.2195
2-1 Lugia
383614/13/1498.11%254.6140.2194
2-1 Lugia
383913/14/1598.71%253.6140.9195
384013/15/1498.70%253.6141.6194
385415/15/1298.46%255.6141.6192
2-1 Lugia
383113/14/1498.21%253.6140.9194
383213/15/1398.19%253.6141.6193
385015/12/1598.51%255.6139.5195
383914/15/1298.07%254.6141.6192
2-1 Lugia
384215/12/1498.00%255.6139.5194
384315/13/1397.99%255.6140.2193
384515/14/1297.97%255.6140.9192
382213/14/1397.70%253.6140.9193
383312/15/1598.81%252.6141.6195
382913/13/1598.22%253.6140.2195
383514/12/1598.12%254.6139.5195
382113/13/1497.72%253.6140.2194
382914/14/1297.58%254.6140.9192
382412/14/1598.32%252.6140.9195
382512/15/1498.30%252.6141.6194
381512/14/1497.81%252.6140.9194
381712/15/1397.80%252.6141.6193
382714/12/1497.61%254.6139.5194
382814/13/1397.60%254.6140.2193
383515/13/1297.48%255.6140.2192
382413/15/1297.68%253.6141.6192
383415/12/1397.50%255.6139.5193
380712/14/1397.31%252.6140.9193
381413/14/1297.19%253.6140.9192
382014/13/1297.09%254.6140.2192
381412/13/1597.83%252.6140.2195
382013/12/1597.73%253.6139.5195
380612/13/1497.32%252.6140.2194
381814/12/1397.11%254.6139.5193
382515/12/1296.99%255.6139.5192
381213/12/1497.22%253.6139.5194
381313/13/1397.21%253.6140.2193
380513/13/1296.71%253.6140.2192
381014/12/1296.61%254.6139.5192
380512/12/1597.33%252.6139.5195
380812/15/1297.29%252.6141.6192
379912/14/1296.81%252.6140.9192
379612/12/1496.84%252.6139.5194
380313/12/1396.72%253.6139.5193
379513/12/1296.22%253.6139.5192
379812/13/1396.82%252.6140.2193
378912/13/1296.32%252.6140.2192
378812/12/1396.34%252.6139.5193
378012/12/1295.84%252.6139.5192

If you do not best buddy (L50), vs a non-best-buddy meta

CP and stats at L50; drops measured in the no-best-buddy vs no-best-buddy-meta case.

CPIVs (A/D/HP)IV %AtkDefHPDrops vs a perfect IV
383415/15/15100.00%254.1140.8194drops nothing (Premium)
381814/15/1599.60%253.1140.8194drops nothing (Premium)
382415/14/1599.50%254.1140.0194
382515/15/1499.48%254.1140.8193
0-0 Mewtwo
380313/15/1599.21%252.1140.8194
380914/14/1599.11%253.1140.0194
381014/15/1499.09%253.1140.8193
0-0 Mewtwo
378812/15/1598.81%251.1140.8194
0-0 Latios
379413/14/1598.71%252.1140.0194
379513/15/1498.69%252.1140.8193
0-0 Mewtwo
381515/13/1599.00%254.1139.3194
0-0 Mewtwo
381715/15/1398.97%254.1140.8192
0-0 Mewtwo
379914/13/1598.61%253.1139.3194
0-0 Mewtwo
380214/15/1398.58%253.1140.8192
0-0 Mewtwo
377912/14/1598.32%251.1140.0194
0-0 Latios
378012/15/1498.30%251.1140.8193
378413/13/1598.22%252.1139.3194
0-0 Mewtwo
378713/15/1398.18%252.1140.8192
0-0 Mewtwo
381615/14/1498.99%254.1140.0193
380114/14/1498.60%253.1140.0193
380515/12/1598.51%254.1138.6194
0-0 Mewtwo
380615/13/1498.49%254.1139.3193
380815/14/1398.48%254.1140.0192
380915/15/1298.45%254.1140.8191
378613/14/1498.20%252.1140.0193
379014/12/1598.12%253.1138.6194
0-0 Mewtwo
379114/13/1498.10%253.1139.3193
379214/14/1398.09%253.1140.0192
379414/15/1298.06%253.1140.8191
379815/13/1397.98%254.1139.3192
376912/13/1597.83%251.1139.3194
377212/15/1397.79%251.1140.8192
377513/12/1597.73%252.1138.6194
0-0 Mewtwo
377613/13/1497.71%252.1139.3193
377713/14/1397.70%252.1140.0192
378314/13/1397.60%253.1139.3192
376813/13/1397.21%252.1139.3192
379715/12/1498.00%254.1138.6193
377012/14/1497.81%251.1140.0193
377813/15/1297.67%252.1140.8191
378214/12/1497.61%253.1138.6193
376012/12/1597.33%251.1138.6194
376112/13/1497.32%251.1139.3193
376212/14/1397.30%251.1140.0192
376713/12/1497.22%252.1138.6193
375312/13/1396.82%251.1139.3192
378815/12/1397.49%254.1138.6192
376312/15/1297.28%251.1140.8191
377314/12/1397.11%253.1138.6192
375212/12/1496.83%251.1138.6193
375813/12/1396.72%252.1138.6192
379915/14/1297.96%254.1140.0191
378414/14/1297.58%253.1140.0191
379015/13/1297.47%254.1139.3191
376913/14/1297.19%252.1140.0191
377514/13/1297.09%253.1139.3191
376013/13/1296.70%252.1139.3191
374312/12/1396.33%251.1138.6192
375412/14/1296.80%251.1140.0191
374512/13/1296.31%251.1139.3191
378015/12/1296.98%254.1138.6191
376514/12/1296.60%253.1138.6191
375013/12/1296.21%252.1138.6191
373512/12/1295.83%251.1138.6191

Method and caveats

Format adapted from XehrFelrose's Master League IV deep dives; numbers independently simulated. Generated by scripts/iv_envelope_analysis.py + scripts/render_iv_envelope_article.py.
Battle engine is a Python port of PvPoke; all game data from PvPoke by Empoleon_Dynamite (MIT license). This project would not exist without it.