Sylveon: 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 Sylveon with its standard Master League moveset. Base stats atk 203 / def 205 / 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): Dialga (Origin), Eternatus, Lugia, Lugia (Shadow), Necrozma (Dawn Wings), Yveltal, Groudon, Gholdengo, Mewtwo (Shadow), Florges, Solgaleo, Dialga (Shadow), Dialga, Togekiss, Kyurem, Primarina, Tapu Lele, Gyarados, Groudon (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: Florges 0-0, Gyarados 2-2, Latios (Shadow) 0-1, Necrozma (Dawn Wings) 0-0, Sylveon 0-0, Sylveon 1-1, Sylveon 2-2, Xerneas 0-0

Vs a best-buddy meta

Gains: Landorus (Therian) 2-1, Latias (Shadow) 0-1, Latias 0-1
Gives up: Hydreigon (Shadow) 1-2

Attack IVs

Attack at a perfect IV: 184.3 at L51 (best buddy), 183.2 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)
14182.3SylveonReshiram, Latias (Shadow), Dialga
13181.5SylveonReshiram, Latias (Shadow), Dialga
12180.7SylveonReshiram, Latias (Shadow), Dialga
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:
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 16 HP left of 194 -- a perfect 15/15/15 keeps 143
  • Latias (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)
13 Atk:
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 16 HP left of 194 -- a perfect 15/15/15 keeps 143
  • Latias (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)
  • Palkia (Origin) 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:
  • Latias (Shadow) 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)
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 16 HP left of 194 -- a perfect 15/15/15 keeps 143
  • Latias (Shadow) 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)
  • Latias (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)
  • Lugia 2-1 energy banked: still wins but banks 50 less energy than a perfect 15/15/15, about one fewer charged move (now 7, was 57)
  • Palkia (Origin) 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)

No best buddy, vs a best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14182.3---
13181.5-Gyarados (Shadow)
12180.7-Gyarados (Shadow), Tapu Lele
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 Atk:
  • Yveltal 0-0 energy banked: still wins but banks 50 less energy than a perfect 15/15/15, about one fewer charged move (now 7, was 57)
  • Yveltal 1-0 energy banked: still wins but banks 50 less energy than a perfect 15/15/15, about one fewer charged move (now 7, was 57)
  • Yveltal 2-0 energy banked: still wins but banks 50 less energy than a perfect 15/15/15, about one fewer charged move (now 7, was 57)

Best buddy, vs a non-best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14183.4--
13182.6SylveonReshiram, Latias (Shadow), Dialga
12181.7SylveonReshiram, Latias (Shadow), Dialga
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:
  • Florges 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)
  • Xerneas 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)
13 Atk:
  • Florges 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)
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 18 HP left of 195 -- a perfect 15/15/15 keeps 144
  • Latias (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)
  • Xerneas 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:
  • Florges 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)
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 18 HP left of 195 -- a perfect 15/15/15 keeps 144
  • Latias (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)
  • Palkia (Origin) 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)
  • Xerneas 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 best-buddy meta

AtkAttackCMP lostBreakpoint lostMatchups dropped (you-opp)
14183.4SylveonReshiram, Latias (Shadow), Dialga
13182.6SylveonReshiram, Latias (Shadow), Dialga
12181.7SylveonReshiram, Latias (Shadow), Dialga
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:
  • Latias (Shadow) 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)
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 17 HP left of 195 -- a perfect 15/15/15 keeps 144
  • Latias (Shadow) 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)
  • Latias (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)
13 Atk:
  • Latias (Shadow) 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)
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 17 HP left of 195 -- a perfect 15/15/15 keeps 144
  • Latias (Shadow) 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)
  • Latias (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:
  • Latias (Shadow) 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)
  • Latias (Shadow) 1-1 near-death win: still wins but barely survives, 17 HP left of 195 -- a perfect 15/15/15 keeps 144
  • Latias (Shadow) 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)
  • Latias (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: 186.0 at L51 (best buddy), 184.9 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)
14184.0Annihilape (Shadow)-
13183.2Marshadow, Annihilape (Shadow)
12182.3Marshadow, Groudon, Annihilape (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:
  • Groudon 2-1 near-death win: still wins but barely survives, 10 HP left of 194 -- a perfect 15/15/15 keeps 156

No best buddy, vs a best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14184.0Marshadow
13183.2Marshadow, Groudon
12182.3Zacian (Crowned Sword), Marshadow, Groudon, Jirachi, 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:
  • Groudon 2-1 near-death win: still wins but barely survives, 10 HP left of 194 -- a perfect 15/15/15 keeps 156
12 Def:
  • Groudon 2-1 near-death win: still wins but barely survives, 10 HP left of 194 -- a perfect 15/15/15 keeps 156
  • Togekiss 0-0 near-death win: still wins but barely survives, 6 HP left of 194 -- a perfect 15/15/15 keeps 38
  • Tyranitar (Shadow) 1-1 near-death win: still wins but barely survives, 25 HP left of 194 -- a perfect 15/15/15 keeps 139

Best buddy, vs a non-best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14185.1Meloetta (Aria)
13184.3Ho-Oh, Meloetta (Aria), Annihilape (Shadow)
12183.4Marshadow, Ho-Oh, Meloetta (Aria), Annihilape (Shadow)

Best buddy, vs a best-buddy meta

DefDefenseBulkpoint lostMatchups dropped (you-opp)
14185.1Annihilape (Shadow)-
13184.3Marshadow, Annihilape (Shadow)
12183.4Marshadow, Groudon, Annihilape (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:
  • Groudon 2-1 near-death win: still wins but barely survives, 11 HP left of 195 -- a perfect 15/15/15 keeps 157
  • Keldeo (Ordinary) 0-1 near-death win: still wins but barely survives, 7 HP left of 195 -- a perfect 15/15/15 keeps 41
  • Keldeo (Resolute) 0-1 near-death win: still wins but barely survives, 7 HP left of 195 -- a perfect 15/15/15 keeps 35

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:
  • Tapu Lele 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)
  • Togekiss 0-0 near-death win: still wins but barely survives, 6 HP left of 191 -- a perfect 15/15/15 keeps 39
  • Tyranitar (Shadow) 1-1 near-death win: still wins but barely survives, 24 HP left of 191 -- a perfect 15/15/15 keeps 139
  • Zacian (Crowned Sword) 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

HPHPMatchups dropped (you-opp)
14193
1-2 Latios
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:
  • Togekiss 0-0 near-death win: still wins but barely survives, 6 HP left of 192 -- a perfect 15/15/15 keeps 38
12 HP:
  • Tapu Lele 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)
  • Togekiss 0-0 near-death win: still wins but barely survives, 5 HP left of 191 -- a perfect 15/15/15 keeps 38
  • Tyranitar (Shadow) 1-1 near-death win: still wins but barely survives, 24 HP left of 191 -- a perfect 15/15/15 keeps 139
  • Zacian (Crowned Sword) 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)

Best buddy, vs a non-best-buddy meta

HPHPMatchups dropped (you-opp)
14194
13193
12192
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:
  • Keldeo (Ordinary) 0-1 near-death win: still wins but barely survives, 8 HP left of 192 -- a perfect 15/15/15 keeps 42
  • Keldeo (Resolute) 0-1 near-death win: still wins but barely survives, 8 HP left of 192 -- a perfect 15/15/15 keeps 36

Best buddy, vs a best-buddy meta

HPHPMatchups dropped (you-opp)
14194-
13193-
12192
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 HP:
  • Keldeo (Ordinary) 0-1 near-death win: still wins but barely survives, 8 HP left of 194 -- a perfect 15/15/15 keeps 41
  • Keldeo (Resolute) 0-1 near-death win: still wins but barely survives, 8 HP left of 194 -- a perfect 15/15/15 keeps 35
13 HP:
  • Keldeo (Ordinary) 0-1 near-death win: still wins but barely survives, 7 HP left of 193 -- a perfect 15/15/15 keeps 41
  • Keldeo (Resolute) 0-1 near-death win: still wins but barely survives, 7 HP left of 193 -- a perfect 15/15/15 keeps 35
12 HP:
  • Keldeo (Ordinary) 0-1 near-death win: still wins but barely survives, 6 HP left of 192 -- a perfect 15/15/15 keeps 41
  • Keldeo (Resolute) 0-1 near-death win: still wins but barely survives, 6 HP left of 192 -- a perfect 15/15/15 keeps 35

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
351115/15/15100.00%184.3186.0195drops nothing (Premium)
350315/14/1599.55%184.3185.1195drops nothing (Premium)
350315/15/1499.49%184.3186.0194drops nothing (Premium)
349515/14/1499.03%184.3185.1194drops nothing (Premium)
349615/15/1398.97%184.3186.0193drops nothing (Premium)
349515/13/1599.09%184.3184.3195
348815/14/1398.52%184.3185.1193
0-1 Latias
349514/15/1599.54%183.4186.0195
348714/14/1599.09%183.4185.1195
347913/15/1599.08%182.6186.0195
348714/15/1499.03%183.4186.0194
348715/12/1598.64%184.3183.4195
347113/14/1598.63%182.6185.1195
346312/15/1598.62%181.7186.0195
348715/13/1498.58%184.3184.3194
347914/14/1498.58%183.4185.1194
347113/15/1498.57%182.6186.0194
348014/15/1398.52%183.4186.0193
345512/14/1598.18%181.7185.1195
346313/14/1498.13%182.6185.1194
345512/15/1498.12%181.7186.0194
346413/15/1398.07%182.6186.0193
344712/14/1497.67%181.7185.1194
344812/15/1397.61%181.7186.0193
347914/13/1598.64%183.4184.3195
348815/15/1298.46%184.3186.0192
1-2 Latios
346313/13/1598.18%182.6184.3195
347214/14/1398.07%183.4185.1193
344712/13/1597.73%181.7184.3195
345613/14/1397.62%182.6185.1193
344012/14/1397.17%181.7185.1193
347114/12/1598.18%183.4183.4195
347915/12/1498.13%184.3183.4194
1-2 Latios
347114/13/1498.13%183.4184.3194
348015/13/1398.07%184.3184.3193
1-2 Latios
345513/12/1597.73%182.6183.4195
345513/13/1497.68%182.6184.3194
343912/12/1597.28%181.7183.4195
343912/13/1497.23%181.7184.3194
348015/14/1298.01%184.3185.1192
347214/15/1298.01%183.4186.0192
347215/12/1397.62%184.3183.4193
1-2 Latios
345613/15/1297.56%182.6186.0192
344012/15/1297.11%181.7186.0192
346314/12/1497.68%183.4183.4194
1-2 Latios
346414/13/1397.62%183.4184.3193
344813/12/1497.23%182.6183.4194
1-2 Latios
344813/13/1397.17%182.6184.3193
343212/12/1496.78%181.7183.4194
1-2 Latios
343212/13/1396.72%181.7184.3193
346414/14/1297.56%183.4185.1192
345614/12/1397.18%183.4183.4193
344813/14/1297.11%182.6185.1192
344013/12/1396.73%182.6183.4193
343212/14/1296.67%181.7185.1192
342412/12/1396.28%181.7183.4193
347215/13/1297.57%184.3184.3192
346415/12/1297.12%184.3183.4192
345614/13/1297.12%183.4184.3192
344013/13/1296.67%182.6184.3192
342412/13/1296.22%181.7184.3192
344814/12/1296.67%183.4183.4192
343213/12/1296.23%182.6183.4192
341712/12/1295.78%181.7183.4192

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
347015/15/15100.00%183.2184.9194drops nothing (Premium)
345414/15/1599.54%182.3184.9194drops nothing (Premium)
346215/15/1499.48%183.2184.9193
1-2 Latios
343813/15/1599.08%181.5184.9194
344614/15/1499.03%182.3184.9193
1-2 Latios
346215/14/1599.55%183.2184.0194
344614/14/1599.09%182.3184.0194
343013/15/1498.57%181.5184.9193
1-2 Latios
343013/14/1598.63%181.5184.0194
345415/14/1499.03%183.2184.0193
343814/14/1498.58%182.3184.0193
345415/13/1599.09%183.2183.2194
345515/15/1398.97%183.2184.9192
343814/13/1598.64%182.3183.2194
342212/15/1598.62%180.7184.9194
343914/15/1398.52%182.3184.9192
342313/14/1498.12%181.5184.0193
342313/15/1398.06%181.5184.9192
342213/13/1598.18%181.5183.2194
341412/15/1498.12%180.7184.9193
1-2 Latios
344615/13/1498.58%183.2183.2193
341412/14/1598.18%180.7184.0194
343014/13/1498.13%182.3183.2193
344615/12/1598.64%183.2182.3194
343014/12/1598.18%182.3182.3194
341413/12/1597.73%181.5182.3194
341513/13/1497.68%181.5183.2193
340712/14/1497.67%180.7184.0193
340712/15/1397.61%180.7184.9192
344715/14/1398.52%183.2184.0192
344715/15/1298.45%183.2184.9191
343114/14/1398.07%182.3184.0192
343114/15/1298.00%182.3184.9191
340612/13/1597.73%180.7183.2194
341513/14/1397.62%181.5184.0192
341513/15/1297.55%181.5184.9191
343815/12/1498.13%183.2182.3193
343915/13/1398.07%183.2183.2192
343915/14/1298.01%183.2184.0191
342314/12/1497.68%182.3182.3193
342314/13/1397.62%182.3183.2192
342314/14/1297.56%182.3184.0191
340713/12/1497.23%181.5182.3193
340713/13/1397.17%181.5183.2192
340813/14/1297.11%181.5184.0191
343115/12/1397.62%183.2182.3192
339812/12/1597.28%180.7182.3194
339912/13/1497.22%180.7183.2193
341514/12/1397.17%182.3182.3192
339913/12/1396.72%181.5182.3192
343115/13/1297.56%183.2183.2191
339912/14/1397.16%180.7184.0192
341614/13/1297.11%182.3183.2191
340012/15/1297.10%180.7184.9191
340013/13/1296.66%181.5183.2191
339112/12/1496.78%180.7182.3193
339112/13/1396.72%180.7183.2192
339212/14/1296.66%180.7184.0191
338412/12/1396.28%180.7182.3192
342315/12/1297.11%183.2182.3191
340814/12/1296.67%182.3182.3191
339213/12/1296.22%181.5182.3191
338412/13/1296.22%180.7183.2191
337612/12/1295.77%180.7182.3191

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
351115/15/15100.00%184.3186.0195drops nothing (Premium)
350315/14/1599.55%184.3185.1195
350315/15/1499.49%184.3186.0194
349515/13/1599.09%184.3184.3195
349515/14/1499.03%184.3185.1194
349615/15/1398.97%184.3186.0193
348715/13/1498.58%184.3184.3194
348815/14/1398.52%184.3185.1193
348815/15/1298.46%184.3186.0192
349514/15/1599.54%183.4186.0195
348715/12/1598.64%184.3183.4195
348015/13/1398.07%184.3184.3193
347915/12/1498.13%184.3183.4194
348015/14/1298.01%184.3185.1192
1-2 Latios
348714/14/1599.09%183.4185.1195
348714/15/1499.03%183.4186.0194
347914/13/1598.64%183.4184.3195
347914/14/1498.58%183.4185.1194
348014/15/1398.52%183.4186.0193
347114/13/1498.13%183.4184.3194
347214/14/1398.07%183.4185.1193
347214/15/1298.01%183.4186.0192
347215/12/1397.62%184.3183.4193
1-2 Latios
347114/12/1598.18%183.4183.4195
346414/13/1397.62%183.4184.3193
346314/12/1497.68%183.4183.4194
347215/13/1297.57%184.3184.3192
346414/14/1297.56%183.4185.1192
347913/15/1599.08%182.6186.0195
345614/12/1397.18%183.4183.4193
346312/15/1598.62%181.7186.0195
347113/14/1598.63%182.6185.1195
347113/15/1498.57%182.6186.0194
346313/13/1598.18%182.6184.3195
346313/14/1498.13%182.6185.1194
346413/15/1398.07%182.6186.0193
345513/13/1497.68%182.6184.3194
345613/14/1397.62%182.6185.1193
345613/15/1297.56%182.6186.0192
346415/12/1297.12%184.3183.4192
345614/13/1297.12%183.4184.3192
345512/14/1598.18%181.7185.1195
345512/15/1498.12%181.7186.0194
345513/12/1597.73%182.6183.4195
344712/13/1597.73%181.7184.3195
344712/14/1497.67%181.7185.1194
344812/15/1397.61%181.7186.0193
343912/13/1497.23%181.7184.3194
344813/13/1397.17%182.6184.3193
344012/14/1397.17%181.7185.1193
344012/15/1297.11%181.7186.0192
343912/12/1597.28%181.7183.4195
344813/12/1497.23%182.6183.4194
344813/14/1297.11%182.6185.1192
343212/13/1396.72%181.7184.3193
343212/12/1496.78%181.7183.4194
344013/12/1396.73%182.6183.4193
344814/12/1296.67%183.4183.4192
343212/14/1296.67%181.7185.1192
342412/12/1396.28%181.7183.4193
344013/13/1296.67%182.6184.3192
342412/13/1296.22%181.7184.3192
343213/12/1296.23%182.6183.4192
341712/12/1295.78%181.7183.4192

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
347015/15/15100.00%183.2184.9194drops nothing (Premium)
346215/14/1599.55%183.2184.0194drops nothing (Premium)
346215/15/1499.48%183.2184.9193drops nothing (Premium)
345415/14/1499.03%183.2184.0193
0-1 Latias
345415/13/1599.09%183.2183.2194
345414/15/1599.54%182.3184.9194
344614/14/1599.09%182.3184.0194
343813/15/1599.08%181.5184.9194
344614/15/1499.03%182.3184.9193
345515/15/1398.97%183.2184.9192
1-2 Latios
343013/14/1598.63%181.5184.0194
343013/15/1498.57%181.5184.9193
344615/12/1598.64%183.2182.3194
1-2 Latios
342212/15/1598.62%180.7184.9194
344615/13/1498.58%183.2183.2193
1-2 Latios
343814/14/1498.58%182.3184.0193
341412/14/1598.18%180.7184.0194
342313/14/1498.12%181.5184.0193
341412/15/1498.12%180.7184.9193
343814/13/1598.64%182.3183.2194
344715/14/1398.52%183.2184.0192
342213/13/1598.18%181.5183.2194
343815/12/1498.13%183.2182.3193
1-2 Latios
340712/14/1497.67%180.7184.0193
343914/15/1398.52%182.3184.9192
344715/15/1298.45%183.2184.9191
0-2 Goodra
342313/15/1398.06%181.5184.9192
340612/13/1597.73%180.7183.2194
343014/12/1598.18%182.3182.3194
1-2 Latios
343014/13/1498.13%182.3183.2193
341413/12/1597.73%181.5182.3194
1-2 Latios
341513/13/1497.68%181.5183.2193
340712/15/1397.61%180.7184.9192
343114/14/1398.07%182.3184.0192
342314/12/1497.68%182.3182.3193
341513/14/1397.62%181.5184.0192
339812/12/1597.28%180.7182.3194
340713/12/1497.23%181.5182.3193
339912/13/1497.22%180.7183.2193
343915/13/1398.07%183.2183.2192
343915/14/1298.01%183.2184.0191
339912/14/1397.16%180.7184.0192
339112/12/1496.78%180.7182.3193
343114/15/1298.00%182.3184.9191
343115/12/1397.62%183.2182.3192
343115/13/1297.56%183.2183.2191
341513/15/1297.55%181.5184.9191
340012/15/1297.10%180.7184.9191
342315/12/1297.11%183.2182.3191
342314/13/1397.62%182.3183.2192
342314/14/1297.56%182.3184.0191
340713/13/1397.17%181.5183.2192
340813/14/1297.11%181.5184.0191
341514/12/1397.17%182.3182.3192
341614/13/1297.11%182.3183.2191
339913/12/1396.72%181.5182.3192
339112/13/1396.72%180.7183.2192
340013/13/1296.66%181.5183.2191
339212/14/1296.66%180.7184.0191
338412/12/1396.28%180.7182.3192
338412/13/1296.22%180.7183.2191
340814/12/1296.67%182.3182.3191
339213/12/1296.22%181.5182.3191
337612/12/1295.77%180.7182.3191

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.