private CheckResult VerifyAbility(LegalityAnalysis data)
{
var pkm = data.pkm;
var pi = data.PersonalInfo;
// Check ability is possible (within bounds)
int ability = pkm.Ability;
int abilval = pi.GetAbilityIndex(ability);
if (abilval < 0)
{
return(GetInvalid(LAbilityUnexpected));
}
var abilities = pi.Abilities;
int format = pkm.Format;
if (format >= 6)
{
// Check AbilityNumber is a single set bit
var num = pkm.AbilityNumber;
if (!(num != 0 && (num & (num - 1)) == 0)) // not [!zero, and power of 2]
{
return(GetInvalid(LAbilityMismatchFlag));
}
// Check AbilityNumber points to ability
int an = num >> 1;
if (an >= abilities.Count || abilities[an] != ability)
{
return(GetInvalid(LAbilityMismatchFlag));
}
// Check AbilityNumber for transfers without unique abilities
int gen = data.Info.Generation;
if (gen is 3 or 4 or 5 && num != 4)
{
// To determine AbilityNumber [PK5->PK6], check if the first ability in Personal matches the ability.
// It is not possible to flip it to the other index as capsule requires unique abilities.
if (abilities[0] == abilities[1] && num != 1)
{
// Check if any pre-evolution could have it flipped.
var evos = data.Info.EvoChainsAllGens[6];
var pt = GameData.GetPersonal(GameUtil.GetVersion(pkm.Format));
if (!GetWasDual(evos, pt, pkm))
{
return(GetInvalid(LAbilityMismatchFlag));
}
}
}
}
if (format >= 8) // Ability Patch
{
if (pkm.AbilityNumber == 4)
{
if (CanAbilityPatch(format, abilities, pkm.Species))
{
return(GetValid(LAbilityPatchUsed));
}
var e = data.EncounterOriginal;
if (e.Species != pkm.Species && CanAbilityPatch(format, PKX.Personal.GetFormEntry(e.Species, e.Form).Abilities, e.Species))
{
return(GetValid(LAbilityPatchUsed));
}
}
}
var enc = data.EncounterMatch;
if (enc is MysteryGift {
Generation : >= 4
} g)
{
return(VerifyAbilityMG(data, g, abilities));
}
if (format < 6)
{
return(VerifyAbility345(data, enc, abilities, abilval));
}
return(VerifyAbility(data, abilities, abilval));
}