It is possible for more than one IV+level configuration to be optimal for a given Pokémon in a given League. These Pokémon each have a configuration functionally equivalent to their optimal Ultra League configuration. Pokémon incapable of meeting the Great League CP bound of 1500 are not included.
TPokémonOptimumFunctional optima
grass poisonIvysaur15-15-15 50 (1921)15-15-14 50 (1915)
bug flyingButterfree15-15-15 50 (2065)15-15-14 50 (2059)
poisonArbok15-15-15 50 (2171)15-15-14 50 (2165)
electricRaichu15-15-15 50 (2467)15-15-14 50 (2459)
grass poisonGloom15-15-15 50 (1900)15-15-14 50 (1895)
bug grassParasect15-15-15 50 (2102)15-15-14 50 (2096)
groundDugtrio15-15-15 50 (1760)15-15-14 50 (1753)
ground steelAlolan Dugtrio15-15-15 50 (2145)15-15-14 50 (2136)
normal flyingDodrio0-15-15 50 (2498)0-15-14 50 (2491)
poisonMuk0-15-15 38.5 (2500)0-15-14 38.5 (2495)
poison darkAlolan Muk0-15-15 38.5 (2500)0-15-14 38.5 (2495)
psychicHypno15-15-15 50 (2363)15-15-14 50 (2357)
electricElectrode15-15-15 50 (2373)15-15-14 50 (2366)
electric grassHisuian Electrode15-15-15 50 (2430)15-15-14 50 (2423)
groundMarowak15-15-15 50 (2075)15-15-14 50 (2069)
fire ghostAlolan Marowak15-15-15 50 (2075)15-15-14 50 (2069)
normalTauros0-15-15 42 (2498)0-15-14 42 (2491)
rock waterOmanyte15-15-15 50 (1746)15-15-14 50 (1739)
grassBayleef15-15-15 50 (1644)15-15-14 50 (1639)
normalFurret15-15-15 50 (1987)15-15-14 50 (1982)
dark flyingMurkrow15-15-15 50 (1766)15-15-14 50 (1761)
poison psychicGalarian Slowking0-15-15 39.5 (2500)0-15-14 39.5 (2495)
ghostMisdreavus15-15-15 50 (2178)15-15-14 50 (2171)
normalTeddiursa15-15-15 50 (1502)15-15-14 50 (1497)
ghostGalarian Corsola15-15-15 50 (1692)15-15-14 50 (1687)
fireEntei0-12-15 27 (2498)0-13-14 27 (2500)
0-13-13 27 (2495)
fire fightingCombusken15-15-15 50 (1868)15-15-14 50 (1862)
normalLinoone15-15-15 50 (1879)15-15-14 50 (1874)
dark normalGalarian Linoone15-15-15 50 (1879)15-15-14 50 (1874)
bug flyingBeautifly15-15-15 50 (1996)15-15-14 50 (1990)
normal flyingSwellow15-15-15 50 (2170)15-15-14 50 (2164)
water flyingPelipper15-15-15 50 (2404)15-15-14 50 (2397)
steel rockLairon15-15-15 50 (2324)15-15-14 50 (2317)
fighting psychicMedicham15-15-15 50 (1618)15-15-14 50 (1613)
electricPlusle15-15-15 50 (2010)15-15-14 50 (2004)
electricMinun15-15-15 50 (1915)15-15-14 50 (1910)
psychicSpoink15-15-15 50 (1508)15-15-14 50 (1504)
water groundWhiscash15-15-15 50 (2346)15-15-14 50 (2342)
ground psychicClaydol15-15-15 50 (2229)15-15-14 50 (2222)
normalKecleon15-15-15 50 (2314)15-15-14 50 (2307)
grass flyingTropius15-15-15 50 (2194)15-15-14 50 (2189)
dragon flyingSalamence1-15-15 24.5 (2499)1-15-14 24.5 (2493)
steel psychicMetang15-15-15 50 (1946)15-15-14 50 (1940)
waterKyogre0-15-14 22.5 (2500)0-15-13 22.5 (2495)
groundGroudon0-15-14 22.5 (2500)0-15-13 22.5 (2495)
electricLuxio15-15-15 50 (1680)15-15-14 50 (1675)
rockCranidos15-15-15 50 (2058)15-15-14 50 (2052)
rock steelBastiodon15-15-15 50 (1741)15-15-14 50 (1735)
bug grassWormadam Plant15-15-15 50 (2005)15-15-14 50 (1999)
bug groundWormadam Sandy15-15-15 50 (2005)15-15-14 50 (1999)
bug steelWormadam Trash15-15-15 50 (1802)15-15-14 50 (1796)
normalMunchlax15-15-15 50 (2139)15-15-14 50 (2135)
rock steelProbopass15-15-15 50 (2351)15-15-14 50 (2344)
grassServine15-15-15 50 (1629)15-15-14 50 (1625)
normalWatchog15-15-15 50 (2056)15-15-14 50 (2050)
psychic flyingSwoobat15-15-15 50 (1940)15-15-14 50 (1935)
groundDrilbur15-15-15 50 (1555)15-15-14 50 (1551)
normalAudino15-15-15 50 (1902)15-15-14 50 (1898)
fightingGurdurr15-15-15 50 (2452)15-15-14 50 (2447)
grass fairyWhimsicott15-15-15 50 (2277)15-15-14 50 (2270)
ground darkKrokorok15-15-15 50 (1603)15-15-14 50 (1599)
psychicGothorita15-15-15 50 (1813)15-15-14 50 (1808)
steelKlang15-15-15 50 (2088)15-15-14 50 (2082)
ghost fireLampent15-15-15 50 (1931)15-15-14 50 (1925)
dragonAxew15-15-15 50 (1547)15-15-14 50 (1542)
dark flyingMandibuzz15-15-15 50 (2417)15-15-14 50 (2413)
normal groundDiggersby15-15-15 50 (1706)15-15-14 50 (1702)
fire flyingTalonflame15-15-15 50 (2493)15-15-14 50 (2486)
fightingPancham15-15-15 50 (1683)15-15-14 50 (1678)
steel ghostAegislash15-15-15 50 (1746)15-15-14 50 (1741)
fighting flyingHawlucha0-15-15 49 (2500)0-15-14 49 (2493)
electric fairyDedenne15-15-15 50 (2081)15-15-14 50 (2075)
grass flyingDartrix15-15-15 50 (1950)15-15-14 50 (1945)
waterBrionne15-15-15 50 (2131)15-15-14 50 (2124)
bug fairyRibombee15-15-15 50 (2488)15-15-14 50 (2480)
grass fairyShiinotic15-15-15 50 (2104)15-15-14 50 (2098)
steel flyingCelesteela0-15-15 30.5 (2500)0-15-14 30.5 (2495)
poisonPoipole15-15-15 50 (1854)15-15-14 50 (1849)
bug psychicOrbeetle14-15-15 50 (2499)14-15-14 50 (2491)
grassEldegoss15-15-15 50 (2255)15-15-14 50 (2249)
grass dragonFlapple0-15-15 46.5 (2498)0-15-14 46.5 (2491)
electric poisonToxtricity0-15-15 42 (2500)0-15-14 42 (2494)
fightingKubfu15-15-15 50 (1919)15-15-14 50 (1913)
bugSpidops15-15-15 50 (1907)15-15-14 50 (1901)
darkMaschiff15-15-15 50 (1582)15-15-14 50 (1577)
waterWugtrio15-15-15 50 (2142)15-15-14 50 (2134)
iceCetitan0-14-15 30.5 (2500)0-14-14 30.5 (2497)
Pokémon GO: A Quantitative Approach