const u8 gItemEffect_Potion[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 20, // Amount of HP to recover
};

const u8 gItemEffect_Antidote[6] = {
    [3] = ITEM3_POISON,
};

const u8 gItemEffect_BurnHeal[6] = {
    [3] = ITEM3_BURN,
};

const u8 gItemEffect_IceHeal[6] = {
    [3] = ITEM3_FREEZE,
};

const u8 gItemEffect_Awakening[6] = {
    [3] = ITEM3_SLEEP,
};

const u8 gItemEffect_ParalyzeHeal[6] = {
    [3] = ITEM3_PARALYSIS,
};

const u8 gItemEffect_FullRestore[7] = {
    [3] = ITEM3_STATUS_ALL,
    [4] = ITEM4_HEAL_HP,
    [6] = ITEM6_HEAL_HP_FULL,
};

const u8 gItemEffect_MaxPotion[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = ITEM6_HEAL_HP_FULL,
};

const u8 gItemEffect_HyperPotion[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 200, // Amount of HP to recover
};

const u8 gItemEffect_SuperPotion[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 50, // Amount of HP to recover
};

const u8 gItemEffect_FullHeal[6] = {
    [3] = ITEM3_STATUS_ALL,
};

const u8 gItemEffect_Revive[7] = {
    [4] = ITEM4_REVIVE | ITEM4_HEAL_HP,
    [6] = ITEM6_HEAL_HP_HALF,
};

const u8 gItemEffect_MaxRevive[7] = {
    [4] = ITEM4_REVIVE | ITEM4_HEAL_HP,
    [6] = ITEM6_HEAL_HP_FULL,
};

const u8 gItemEffect_FreshWater[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 50, // Amount of HP to recover
};

const u8 gItemEffect_SodaPop[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 60, // Amount of HP to recover
};

const u8 gItemEffect_Lemonade[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 80, // Amount of HP to recover
};

const u8 gItemEffect_MoomooMilk[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 100, // Amount of HP to recover
};

const u8 gItemEffect_EnergyPowder[10] = {
    [4] = ITEM4_HEAL_HP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = 50,  // Amount of HP to recover
    [7] = -5,  // Friendship change, low
    [8] = -5,  // Friendship change, mid
    [9] = -10, // Friendship change, high
};

const u8 gItemEffect_EnergyRoot[10] = {
    [4] = ITEM4_HEAL_HP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = 200, // Amount of HP to recover
    [7] = -10, // Friendship change, low
    [8] = -10, // Friendship change, mid
    [9] = -15, // Friendship change, high
};

const u8 gItemEffect_HealPowder[9] = {
    [3] = ITEM3_STATUS_ALL,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = -5,  // Friendship change, low
    [7] = -5,  // Friendship change, mid
    [8] = -10, // Friendship change, high
};

const u8 gItemEffect_RevivalHerb[10] = {
    [4] = ITEM4_REVIVE | ITEM4_HEAL_HP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_HEAL_HP_FULL,
    [7] = -15, // Friendship change, low
    [8] = -15, // Friendship change, mid
    [9] = -20, // Friendship change, high
};

const u8 gItemEffect_Ether[7] = {
    [4] = ITEM4_HEAL_PP_ONE | ITEM4_HEAL_PP,
    [6] = 10,
};

const u8 gItemEffect_MaxEther[7] = {
    [4] = ITEM4_HEAL_PP_ONE | ITEM4_HEAL_PP,
    [6] = ITEM6_HEAL_PP_FULL,
};

const u8 gItemEffect_Elixir[7] = {
    [4] = ITEM4_HEAL_PP,
    [6] = 10, // Amount of PP to recover
};

const u8 gItemEffect_MaxElixir[7] = {
    [4] = ITEM4_HEAL_PP,
    [6] = ITEM6_HEAL_PP_FULL,
};

const u8 gItemEffect_LavaCookie[6] = {
    [3] = ITEM3_STATUS_ALL,
};

const u8 gItemEffect_BlueFlute[6] = {
    [3] = ITEM3_SLEEP,
};

const u8 gItemEffect_YellowFlute[6] = {
    [3] = ITEM3_CONFUSION,
};

const u8 gItemEffect_RedFlute[6] = {
    [0] = ITEM0_INFATUATION,
};

const u8 gItemEffect_BerryJuice[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 20, // Amount of HP to recover
};

const u8 gItemEffect_SacredAsh[7] = {
    [0] = ITEM0_SACRED_ASH,
    [4] = ITEM4_REVIVE | ITEM4_HEAL_HP,
    [6] = ITEM6_HEAL_HP_FULL,
};

#define VITAMIN_FRIENDSHIP_CHANGE(i)             \
    [(i) + 0] = 5, /* Friendship change, low */  \
    [(i) + 1] = 3, /* Friendship change, mid */  \
    [(i) + 2] = 2  /* Friendship change, high */

const u8 gItemEffect_HPUp[10] = {
    [4] = ITEM4_EV_HP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_ADD_EV,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_Protein[10] = {
    [4] = ITEM4_EV_ATK,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_ADD_EV,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_Iron[10] = {
    [5] = ITEM5_EV_DEF | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_ADD_EV,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_Carbos[10] = {
    [5] = ITEM5_EV_SPEED | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_ADD_EV,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_Calcium[10] = {
    [5] = ITEM5_EV_SPATK | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_ADD_EV,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_RareCandy[10] = {
    [3] = ITEM3_LEVEL_UP,
    [4] = ITEM4_REVIVE | ITEM4_HEAL_HP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_HEAL_HP_LVL_UP,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_PPUp[9] = {
    [4] = ITEM4_PP_UP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    VITAMIN_FRIENDSHIP_CHANGE(6),
};

const u8 gItemEffect_Zinc[10] = {
    [5] = ITEM5_EV_SPDEF | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_ADD_EV,
    VITAMIN_FRIENDSHIP_CHANGE(7),
};

const u8 gItemEffect_PPMax[9] = {
    [5] = ITEM5_PP_MAX | ITEM5_FRIENDSHIP_ALL,
    VITAMIN_FRIENDSHIP_CHANGE(6),
};

#define STAT_BOOST_FRIENDSHIP_CHANGE      \
    [6] = 1, /* Friendship change, low */ \
    [7] = 1  /* Friendship change, mid */

const u8 gItemEffect_GuardSpec[8] = {
    [3] = ITEM3_GUARD_SPEC,
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

// The first item effect value for the stat boost items
// only uses the least significant bit of its full mask.
// The full constant is commented next to it

const u8 gItemEffect_DireHit[8] = {
    [0] = 1 << 5, // ITEM0_DIRE_HIT
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_XAttack[8] = {
    [0] = 1, // ITEM0_X_ATTACK
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_XDefend[8] = {
    [1] = 1 << 4, /// ITEM1_X_DEFEND
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_XSpeed[8] = {
    [1] = 1, // ITEM1_X_SPEED
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_XAccuracy[8] = {
    [2] = 1 << 4, // ITEM2_X_ACCURACY
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_XSpecial[8] = {
    [2] = 1, // ITEM2_X_SPATK
    [5] = ITEM5_FRIENDSHIP_LOW | ITEM5_FRIENDSHIP_MID,
    STAT_BOOST_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_SunStone[6] = {
    [4] = ITEM4_EVO_STONE,
};

const u8 gItemEffect_MoonStone[6] = {
    [4] = ITEM4_EVO_STONE,
};

const u8 gItemEffect_FireStone[6] = {
    [4] = ITEM4_EVO_STONE,
};

const u8 gItemEffect_ThunderStone[6] = {
    [4] = ITEM4_EVO_STONE,
};

const u8 gItemEffect_WaterStone[6] = {
    [4] = ITEM4_EVO_STONE,
};

const u8 gItemEffect_LeafStone[6] = {
    [4] = ITEM4_EVO_STONE,
};

const u8 gItemEffect_CheriBerry[6] = {
    [3] = ITEM3_PARALYSIS,
};

const u8 gItemEffect_ChestoBerry[6] = {
    [3] = ITEM3_SLEEP,
};

const u8 gItemEffect_PechaBerry[6] = {
    [3] = ITEM3_POISON,
};

const u8 gItemEffect_RawstBerry[6] = {
    [3] = ITEM3_BURN,
};

const u8 gItemEffect_AspearBerry[6] = {
    [3] = ITEM3_FREEZE,
};

const u8 gItemEffect_LeppaBerry[7] = {
    [4] = ITEM4_HEAL_PP_ONE | ITEM4_HEAL_PP,
    [6] = 10, // Amount of PP to recover
};

const u8 gItemEffect_OranBerry[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 10, // Amount of HP to recover
};

const u8 gItemEffect_PersimBerry[6] = {
    [3] = ITEM3_CONFUSION,
};

const u8 gItemEffect_LumBerry[6] = {
    [3] = ITEM3_STATUS_ALL,
};

const u8 gItemEffect_SitrusBerry[7] = {
    [4] = ITEM4_HEAL_HP,
    [6] = 30, // Amount of HP to recover
};

#define EV_BERRY_FRIENDSHIP_CHANGE          \
    [7] = 10, /* Friendship change, low */  \
    [8] = 5,  /* Friendship change, mid */  \
    [9] = 2   /* Friendship change, high */

const u8 gItemEffect_PomegBerry[10] = {
    [4] = ITEM4_EV_HP,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_SUBTRACT_EV,
    EV_BERRY_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_KelpsyBerry[10] = {
    [4] = ITEM4_EV_ATK,
    [5] = ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_SUBTRACT_EV,
    EV_BERRY_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_QualotBerry[10] = {
    [5] = ITEM5_EV_DEF | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_SUBTRACT_EV,
    EV_BERRY_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_HondewBerry[10] = {
    [5] = ITEM5_EV_SPATK | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_SUBTRACT_EV,
    EV_BERRY_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_GrepaBerry[10] = {
    [5] = ITEM5_EV_SPDEF | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_SUBTRACT_EV,
    EV_BERRY_FRIENDSHIP_CHANGE,
};

const u8 gItemEffect_TamatoBerry[10] = {
    [5] = ITEM5_EV_SPEED | ITEM5_FRIENDSHIP_ALL,
    [6] = ITEM6_SUBTRACT_EV,
    EV_BERRY_FRIENDSHIP_CHANGE,
};

const u8 *const gItemEffectTable[] =
{
    [ITEM_POTION - ITEM_POTION]        = gItemEffect_Potion,
    [ITEM_ANTIDOTE - ITEM_POTION]      = gItemEffect_Antidote,
    [ITEM_BURN_HEAL - ITEM_POTION]     = gItemEffect_BurnHeal,
    [ITEM_ICE_HEAL - ITEM_POTION]      = gItemEffect_IceHeal,
    [ITEM_AWAKENING - ITEM_POTION]     = gItemEffect_Awakening,
    [ITEM_PARALYZE_HEAL - ITEM_POTION] = gItemEffect_ParalyzeHeal,
    [ITEM_FULL_RESTORE - ITEM_POTION]  = gItemEffect_FullRestore,
    [ITEM_MAX_POTION - ITEM_POTION]    = gItemEffect_MaxPotion,
    [ITEM_HYPER_POTION - ITEM_POTION]  = gItemEffect_HyperPotion,
    [ITEM_SUPER_POTION - ITEM_POTION]  = gItemEffect_SuperPotion,
    [ITEM_FULL_HEAL - ITEM_POTION]     = gItemEffect_FullHeal,
    [ITEM_REVIVE - ITEM_POTION]        = gItemEffect_Revive,
    [ITEM_MAX_REVIVE - ITEM_POTION]    = gItemEffect_MaxRevive,
    [ITEM_FRESH_WATER - ITEM_POTION]   = gItemEffect_FreshWater,
    [ITEM_SODA_POP - ITEM_POTION]      = gItemEffect_SodaPop,
    [ITEM_LEMONADE - ITEM_POTION]      = gItemEffect_Lemonade,
    [ITEM_MOOMOO_MILK - ITEM_POTION]   = gItemEffect_MoomooMilk,
    [ITEM_ENERGY_POWDER - ITEM_POTION] = gItemEffect_EnergyPowder,
    [ITEM_ENERGY_ROOT - ITEM_POTION]   = gItemEffect_EnergyRoot,
    [ITEM_HEAL_POWDER - ITEM_POTION]   = gItemEffect_HealPowder,
    [ITEM_REVIVAL_HERB - ITEM_POTION]  = gItemEffect_RevivalHerb,
    [ITEM_ETHER - ITEM_POTION]         = gItemEffect_Ether,
    [ITEM_MAX_ETHER - ITEM_POTION]     = gItemEffect_MaxEther,
    [ITEM_ELIXIR - ITEM_POTION]        = gItemEffect_Elixir,
    [ITEM_MAX_ELIXIR - ITEM_POTION]    = gItemEffect_MaxElixir,
    [ITEM_LAVA_COOKIE - ITEM_POTION]   = gItemEffect_LavaCookie,
    [ITEM_BLUE_FLUTE - ITEM_POTION]    = gItemEffect_BlueFlute,
    [ITEM_YELLOW_FLUTE - ITEM_POTION]  = gItemEffect_YellowFlute,
    [ITEM_RED_FLUTE - ITEM_POTION]     = gItemEffect_RedFlute,
    [ITEM_BERRY_JUICE - ITEM_POTION]   = gItemEffect_BerryJuice,
    [ITEM_SACRED_ASH - ITEM_POTION]    = gItemEffect_SacredAsh,
    [ITEM_HP_UP - ITEM_POTION]         = gItemEffect_HPUp,
    [ITEM_PROTEIN - ITEM_POTION]       = gItemEffect_Protein,
    [ITEM_IRON - ITEM_POTION]          = gItemEffect_Iron,
    [ITEM_CARBOS - ITEM_POTION]        = gItemEffect_Carbos,
    [ITEM_CALCIUM - ITEM_POTION]       = gItemEffect_Calcium,
    [ITEM_RARE_CANDY - ITEM_POTION]    = gItemEffect_RareCandy,
    [ITEM_PP_UP - ITEM_POTION]         = gItemEffect_PPUp,
    [ITEM_ZINC - ITEM_POTION]          = gItemEffect_Zinc,
    [ITEM_PP_MAX - ITEM_POTION]        = gItemEffect_PPMax,
    [ITEM_GUARD_SPEC - ITEM_POTION]    = gItemEffect_GuardSpec,
    [ITEM_DIRE_HIT - ITEM_POTION]      = gItemEffect_DireHit,
    [ITEM_X_ATTACK - ITEM_POTION]      = gItemEffect_XAttack,
    [ITEM_X_DEFEND - ITEM_POTION]      = gItemEffect_XDefend,
    [ITEM_X_SPEED - ITEM_POTION]       = gItemEffect_XSpeed,
    [ITEM_X_ACCURACY - ITEM_POTION]    = gItemEffect_XAccuracy,
    [ITEM_X_SPECIAL - ITEM_POTION]     = gItemEffect_XSpecial,
    [ITEM_SUN_STONE - ITEM_POTION]     = gItemEffect_SunStone,
    [ITEM_MOON_STONE - ITEM_POTION]    = gItemEffect_MoonStone,
    [ITEM_FIRE_STONE - ITEM_POTION]    = gItemEffect_FireStone,
    [ITEM_THUNDER_STONE - ITEM_POTION] = gItemEffect_ThunderStone,
    [ITEM_WATER_STONE - ITEM_POTION]   = gItemEffect_WaterStone,
    [ITEM_LEAF_STONE - ITEM_POTION]    = gItemEffect_LeafStone,
    [ITEM_CHERI_BERRY - ITEM_POTION]   = gItemEffect_CheriBerry,
    [ITEM_CHESTO_BERRY - ITEM_POTION]  = gItemEffect_ChestoBerry,
    [ITEM_PECHA_BERRY - ITEM_POTION]   = gItemEffect_PechaBerry,
    [ITEM_RAWST_BERRY - ITEM_POTION]   = gItemEffect_RawstBerry,
    [ITEM_ASPEAR_BERRY - ITEM_POTION]  = gItemEffect_AspearBerry,
    [ITEM_LEPPA_BERRY - ITEM_POTION]   = gItemEffect_LeppaBerry,
    [ITEM_ORAN_BERRY - ITEM_POTION]    = gItemEffect_OranBerry,
    [ITEM_PERSIM_BERRY - ITEM_POTION]  = gItemEffect_PersimBerry,
    [ITEM_LUM_BERRY - ITEM_POTION]     = gItemEffect_LumBerry,
    [ITEM_SITRUS_BERRY - ITEM_POTION]  = gItemEffect_SitrusBerry,
    [ITEM_POMEG_BERRY - ITEM_POTION]   = gItemEffect_PomegBerry,
    [ITEM_KELPSY_BERRY - ITEM_POTION]  = gItemEffect_KelpsyBerry,
    [ITEM_QUALOT_BERRY - ITEM_POTION]  = gItemEffect_QualotBerry,
    [ITEM_HONDEW_BERRY - ITEM_POTION]  = gItemEffect_HondewBerry,
    [ITEM_GREPA_BERRY - ITEM_POTION]   = gItemEffect_GrepaBerry,
    [ITEM_TAMATO_BERRY - ITEM_POTION]  = gItemEffect_TamatoBerry,
    [LAST_BERRY_INDEX - ITEM_POTION]   = NULL
};