What Sacred Gold & Storm Silver changes

Every stat, type and ability this hack alters, next to what the official games do. Measured from the guide's own data, so it can't drift from the pages it links to.

Compared against present-day official data. The Fairy type and hidden abilities arrived after Pokémon HeartGold / SoulSilver, so a difference here can belong to the series rather than to this hack.

Base stat changes (97)

	Pokémon	What changed	Total
	Butterfree	Sp. Atk 90→100, Sp. Def 80→100, Speed 70→80	395→435
	Beedrill	Attack 90→100, Sp. Def 80→90, Speed 75→95	395→435
	Pidgeot	HP 83→103, Attack 80→91	479→510
	Raticate	HP 55→65, Attack 81→91, Speed 97→107	413→443
	Fearow	Attack 90→95, Speed 100→105	442→452
	Arbok	Attack 95→91, Speed 80→86	448→450
	Pikachu	Attack 55→65, Sp. Atk 50→60, Speed 90→95	320→345
	Raichu	Attack 90→100, Sp. Atk 90→100, Speed 110→121	485→516
	Nidoqueen	HP 90→100	505→515
	Nidoking	Attack 102→97, Sp. Atk 85→90	505→505
	Wigglytuff	HP 140→148, Defense 45→55, Sp. Def 50→65	435→468
	Vileplume	Sp. Def 90→100	490→500
	Parasect	Attack 95→115, Defense 80→100	405→445
	Venomoth	Sp. Atk 90→115	450→475
	Persian	Attack 70→90	440→460
	Poliwrath	Defense 95→100	510→515
	Victreebel	Attack 105→115, Sp. Atk 100→110	490→510
	Dewgong	Sp. Atk 70→80	475→485
	Onix	Attack 45→80	385→420
	Marowak	Speed 45→70	425→450
	Seadra	HP 55→65, Attack 65→75, Sp. Def 45→75	440→490
	Seaking	Attack 92→102, Speed 68→88	450→480
	Jynx	Sp. Atk 115→120	455→460
	Furret	Attack 76→86, Speed 90→108	415→443
	Ledyba	Attack 20→40, Sp. Atk 40→20	265→265
	Ledian	Attack 35→95, Sp. Atk 55→35	390→430
	Ariados	Speed 40→80	400→440
	Lanturn	Sp. Atk 76→86, Sp. Def 76→86	460→480
	Xatu	Sp. Atk 95→100, Speed 95→100	470→480
	Bellossom	Sp. Atk 90→100, Sp. Def 100→110	490→510
	Marill	Sp. Atk 20→50	250→280
	Azumarill	HP 100→110, Sp. Atk 60→90	420→460
	Sudowoodo	HP 70→75, Attack 100→115, Defense 115→130, Sp. Def 65→80	410→460
	Politoed	Defense 75→85, Speed 70→75	500→515
	Sunflora	Defense 55→90, Sp. Atk 105→125, Sp. Def 85→95	425→490
	Quagsire	Defense 85→95	430→440
	Girafarig	Sp. Atk 90→110, Speed 85→105	455→495
	Dunsparce	HP 100→105, Attack 70→80	415→430
	Steelix	Attack 85→90	510→515
	Qwilfish	Attack 95→100, Sp. Atk 55→80	440→470
	Magcargo	Defense 120→135, Sp. Atk 90→115, Sp. Def 80→115	430→505
	Corsola	Defense 95→115, Sp. Atk 65→105, Sp. Def 95→110	410→485
	Delibird	HP 45→50, Attack 55→95, Defense 45→55, Sp. Atk 65→105, Sp. Def 45→55, Speed 75→115	330→475
	Stantler	Attack 95→100	465→470
	Smeargle	Speed 75→110	250→285
	Mightyena	Attack 90→105, Speed 70→80	420→445
	Linoone	Attack 70→90, Speed 100→105	420→445
	Beautifly	Sp. Atk 100→105, Sp. Def 50→65, Speed 65→85	395→435
	Dustox	Sp. Atk 50→65, Sp. Def 90→105, Speed 65→85	385→435
	Swellow	HP 60→70, Attack 85→95	455→475
	Pelipper	Defense 100→120	440→460
	Ralts	Sp. Atk 45→65	198→218
	Kirlia	Sp. Atk 65→95	278→308
	Masquerain	Sp. Def 82→102, Speed 80→90	454→484
	Nosepass	Sp. Atk 45→65	375→395
	Delcatty	Sp. Atk 55→95	400→440
	Sableye	HP 50→60, Attack 75→95, Defense 75→95, Sp. Def 65→85	380→450
	Mawile	HP 50→60, Attack 85→105, Defense 85→90, Sp. Def 55→90	380→450
	Plusle	Defense 40→50, Sp. Atk 85→90, Sp. Def 75→85, Speed 95→115	405→450
	Minun	Attack 40→50, Sp. Atk 75→85, Sp. Def 85→90, Speed 95→115	405→450
	Volbeat	HP 65→80, Attack 73→30, Defense 75→60, Sp. Atk 47→100, Sp. Def 85→90, Speed 85→90	430→450
	Illumise	HP 65→80, Attack 47→30, Defense 75→60, Sp. Atk 73→90, Sp. Def 85→100, Speed 85→90	430→450
	Swalot	Attack 73→83, Sp. Atk 73→83	467→487
	Torkoal	Attack 85→100, Sp. Atk 85→100	470→500
	Spinda	HP 60→80, Attack 60→80, Defense 60→80, Sp. Atk 60→80, Sp. Def 60→80, Speed 60→80	360→480
	Flygon	Attack 100→110, Sp. Atk 80→100	520→550
	Altaria	Defense 90→100, Sp. Atk 70→90	490→520
	Lunatone	Sp. Atk 95→115	460→480
	Solrock	Attack 95→115	460→480
	Castform	Sp. Atk 70→110, Sp. Def 70→80, Speed 70→80	420→480
	Kecleon	HP 60→80, Attack 90→100, Defense 70→80	440→480
	Shuppet	Sp. Atk 63→73	295→305
	Banette	Sp. Atk 83→103	455→475
	Tropius	HP 99→110, Attack 68→90, Defense 83→90, Sp. Atk 72→90, Sp. Def 87→90, Speed 51→65	460→535
	Chimecho	Sp. Atk 95→110, Sp. Def 90→100, Speed 65→90	455→505
	Glalie	Attack 80→100, Defense 80→120, Sp. Def 80→60, Speed 80→60	480→500
	Luvdisc	HP 43→55, Defense 55→60, Sp. Atk 40→100, Sp. Def 65→80, Speed 97→125	330→450
	Staraptor	HP 85→90, Defense 70→75, Sp. Def 60→65	485→500
	Bibarel	HP 79→89, Attack 85→95, Sp. Atk 55→67	410→442
	Kricketune	Attack 85→96, Defense 51→59, Sp. Def 51→59, Speed 65→74	384→420
	Luxray	Speed 70→82	523→535
	Mothim	Sp. Atk 94→109, Speed 66→91	424→464
	Pachirisu	Sp. Atk 45→100	405→460
	Cherrim	Sp. Atk 87→107	450→470
	Mismagius	Sp. Atk 105→110, Sp. Def 105→110, Speed 105→110	495→510
	Honchkrow	HP 100→105	505→510
	Purugly	HP 71→100, Attack 82→86	452→485
	Skuntank	Sp. Atk 71→77	479→485
	Bronzor	Attack 24→34	300→310
	Chatot	Sp. Atk 92→112, Speed 91→111	411→451
	Carnivine	Attack 100→120, Speed 46→86	454→514
	Lumineon	Sp. Atk 69→89, Speed 91→101	460→490
	Abomasnow	HP 90→100, Attack 92→100, Sp. Atk 92→100	494→520
	Probopass	Sp. Atk 75→85	525→535
	Froslass	Sp. Atk 80→100	480→500
	Rotom	Sp. Atk 95→105, Speed 91→101	440→460
	Phione	HP 80→85, Attack 80→85, Defense 80→85, Sp. Atk 80→85, Sp. Def 80→85, Speed 80→85	480→510

Type changes (10)

	Pokémon	Was	Now
	Venomoth	Bug / Poison	BugPsychic
	Farfetch'D	Normal / Flying	FightingFlying
	Masquerain	Bug / Flying	BugWater
	Volbeat	Bug	BugElectric
	Illumise	Bug	BugElectric
	Glalie	Ice	IceRock
	Luxio	Electric	ElectricDark
	Luxray	Electric	ElectricDark
	Carnivine	Grass	GrassDark
	Electivire	Electric	ElectricFighting

Ability changes (367)

	Pokémon	Gains	Loses
	Pidgey	—	Big Pecks
	Pidgeotto	—	Big Pecks
	Pidgeot	—	Big Pecks
	Rattata	—	Run Away
	Raticate	—	Run Away
	Ekans	—	Unnerve
	Arbok	—	Unnerve
	Pikachu	Lightningrod	Lightning Rod
	Raichu	Lightningrod	Lightning Rod
	Sandshrew	—	Sand Rush
	Sandslash	—	Sand Rush
	Nidoran♀	—	Hustle
	Nidorina	—	Hustle
	Nidoqueen	—	Sheer Force
	Nidoran♂	—	Hustle
	Nidorino	—	Hustle
	Nidoking	—	Sheer Force
	Clefairy	—	Friend Guard
	Clefable	—	Cute Charm
	Vulpix	Forewarn	Drought
	Jigglypuff	Soundproof	Cute Charm, Friend Guard
	Wigglytuff	Soundproof	Cute Charm, Frisk
	Zubat	Anticipation	Infiltrator
	Golbat	Anticipation	Infiltrator
	Paras	—	Damp
	Parasect	—	Damp
	Venonat	—	Run Away
	Venomoth	Poison Heal	Shield Dust, Wonder Skin
	Diglett	—	Sand Force
	Dugtrio	—	Sand Force
	Meowth	—	Unnerve
	Persian	—	Unnerve
	Psyduck	—	Swift Swim
	Golduck	—	Swift Swim
	Mankey	—	Defiant
	Primeape	—	Defiant
	Growlithe	—	Justified
	Arcanine	—	Justified
	Poliwag	—	Swift Swim
	Poliwhirl	—	Swift Swim
	Poliwrath	—	Swift Swim
	Abra	—	Inner Focus
	Kadabra	—	Inner Focus
	Alakazam	—	Inner Focus
	Machop	—	Steadfast
	Machoke	—	Steadfast
	Machamp	—	Steadfast
	Tentacool	—	Rain Dish
	Tentacruel	—	Rain Dish
	Geodude	—	Sand Veil
	Graveler	—	Sand Veil
	Golem	—	Sand Veil
	Ponyta	—	Run Away
	Rapidash	—	Run Away
	Slowpoke	—	Regenerator
	Slowbro	—	Regenerator
	Magnemite	—	Analytic
	Magneton	—	Analytic
	Farfetch'D	Super Luck	Keen Eye, Defiant
	Doduo	—	Run Away
	Dodrio	—	Run Away
	Seel	—	Ice Body
	Dewgong	—	Ice Body
	Grimer	—	Poison Touch
	Muk	—	Poison Touch
	Shellder	—	Overcoat
	Cloyster	—	Overcoat
	Onix	—	Weak Armor
	Drowzee	—	Inner Focus
	Hypno	—	Inner Focus
	Krabby	Shed Skin	Shell Armor, Sheer Force
	Kingler	Shed Skin	Shell Armor, Sheer Force
	Voltorb	—	Soundproof
	Electrode	—	Soundproof
	Exeggcute	—	Harvest
	Exeggutor	—	Harvest
	Cubone	—	Lightning Rod
	Marowak	—	Lightning Rod
	Hitmonlee	—	Unburden
	Hitmonchan	—	Inner Focus
	Lickitung	—	Oblivious
	Koffing	—	Stench
	Weezing	—	Stench
	Rhyhorn	—	Lightning Rod
	Rhydon	—	Lightning Rod
	Chansey	—	Healer
	Tangela	—	Regenerator
	Kangaskhan	—	Inner Focus
	Horsea	—	Damp
	Seadra	—	Damp
	Goldeen	—	Lightning Rod
	Seaking	—	Lightning Rod
	Staryu	—	Analytic
	Starmie	—	Analytic
	Mr. Mime	—	Technician
	Scyther	—	Steadfast
	Jynx	Filter	Oblivious, Forewarn
	Pinsir	—	Moxie
	Tauros	—	Sheer Force
	Magikarp	—	Rattled
	Gyarados	—	Moxie
	Lapras	—	Hydration
	Ditto	—	Imposter
	Eevee	—	Anticipation
	Porygon	—	Analytic
	Omanyte	—	Weak Armor
	Omastar	—	Weak Armor
	Kabuto	—	Weak Armor
	Kabutops	—	Weak Armor
	Aerodactyl	—	Unnerve
	Snorlax	—	Gluttony
	Zapdos	LightningRod	Static
	Dragonite	Marvel Scale	Multiscale
	Mewtwo	Magic Guard	Unnerve
	Mew	Magic Guard	—
	Chikorita	Natural Cure	Leaf Guard
	Bayleef	Natural Cure	Leaf Guard
	Meganium	Natural Cure	Leaf Guard
	Totodile	Guts	Sheer Force
	Croconaw	Guts	Sheer Force
	Feraligatr	Intimidate	Sheer Force
	Sentret	Pickup	Run Away, Frisk
	Furret	Scrappy	Run Away, Frisk
	Hoothoot	—	Keen Eye
	Noctowl	—	Keen Eye
	Ledyba	—	Rattled
	Ledian	—	Swarm
	Spinarak	—	Swarm
	Ariados	—	Swarm
	Crobat	Anticipation	Infiltrator
	Chinchou	—	Illuminate
	Lanturn	—	Illuminate
	Pichu	Lightningrod	Lightning Rod
	Cleffa	—	Friend Guard
	Igglybuff	—	Friend Guard
	Togepi	—	Hustle
	Togetic	—	Hustle
	Natu	—	Magic Bounce
	Xatu	—	Magic Bounce
	Mareep	—	Plus
	Flaaffy	—	Plus
	Ampharos	—	Plus
	Bellossom	Own Tempo	Healer
	Marill	—	Sap Sipper
	Azumarill	—	Sap Sipper
	Sudowoodo	—	Rattled
	Politoed	—	Damp
	Hoppip	—	Infiltrator
	Skiploom	—	Infiltrator
	Jumpluff	—	Infiltrator
	Aipom	—	Skill Link
	Sunkern	—	Early Bird
	Sunflora	—	Early Bird
	Yanma	—	Frisk
	Wooper	—	Damp
	Quagsire	—	Damp
	Espeon	Magic Guard	Magic Bounce
	Umbreon	Magic Guard	Inner Focus
	Murkrow	—	Prankster
	Slowking	—	Regenerator
	Wobbuffet	—	Telepathy
	Girafarig	—	Sap Sipper
	Pineco	—	Overcoat
	Forretress	—	Overcoat
	Dunsparce	—	Rattled
	Gligar	—	Sand Veil
	Steelix	—	Sheer Force
	Snubbull	—	Rattled
	Granbull	—	Rattled
	Qwilfish	—	Swift Swim
	Scizor	—	Light Metal
	Shuckle	Solid Rock	Sturdy, Contrary
	Heracross	—	Moxie
	Sneasel	Technician	Keen Eye, Pickpocket
	Teddiursa	—	Quick Feet
	Ursaring	—	Unnerve
	Slugma	—	Weak Armor
	Magcargo	Solid Rock	Magma Armor, Weak Armor
	Swinub	—	Oblivious
	Piloswine	—	Oblivious
	Corsola	—	Regenerator
	Remoraid	—	Moody
	Octillery	—	Moody
	Delibird	Technician	Hustle, Insomnia
	Mantine	—	Water Veil
	Skarmory	Rock Head	Sturdy, Weak Armor
	Houndour	—	Unnerve
	Houndoom	Intimidate	Early Bird, Unnerve
	Kingdra	—	Damp
	Phanpy	—	Sand Veil
	Donphan	—	Sand Veil
	Porygon2	—	Analytic
	Stantler	—	Sap Sipper
	Smeargle	—	Moody
	Tyrogue	—	Vital Spirit
	Hitmontop	—	Steadfast
	Smoochum	Filter	Oblivious, Forewarn
	Miltank	—	Sap Sipper
	Blissey	—	Healer
	Raikou	Volt Absorb	Inner Focus
	Entei	Flash Fire	Inner Focus
	Suicune	Water Absorb	Inner Focus
	Larvitar	Battle Armor	Sand Veil
	Pupitar	Battle Armor	—
	Tyranitar	Battle Armor	Unnerve
	Lugia	—	Multiscale
	Ho-Oh	—	Regenerator
	Celebi	Magic Guard	—
	Poochyena	—	Rattled
	Mightyena	—	Moxie
	Zigzagoon	—	Quick Feet
	Linoone	—	Quick Feet
	Beautifly	Shield Dust	Rivalry
	Dustox	Compoundeyes	Compound Eyes
	Lotad	—	Own Tempo
	Lombre	—	Own Tempo
	Ludicolo	—	Own Tempo
	Seedot	—	Pickpocket
	Nuzleaf	—	Pickpocket
	Shiftry	—	Pickpocket
	Wingull	—	Keen Eye
	Pelipper	—	Rain Dish
	Ralts	—	Telepathy
	Kirlia	—	Telepathy
	Gardevoir	—	Telepathy
	Masquerain	Levitate	Intimidate, Unnerve
	Shroomish	—	Quick Feet
	Breloom	—	Effect Spore
	Slakoth	Slow Start	—
	Slaking	Slow Start	—
	Nincada	—	Run Away
	Ninjask	—	Infiltrator
	Whismur	—	Rattled
	Makuhita	—	Sheer Force
	Hariyama	—	Sheer Force
	Azurill	—	Sap Sipper
	Nosepass	—	Sand Force
	Skitty	—	Wonder Skin
	Delcatty	—	Wonder Skin
	Sableye	Steadfast	Keen Eye, Prankster
	Mawile	—	Sheer Force
	Aron	—	Heavy Metal
	Lairon	—	Heavy Metal
	Aggron	—	Heavy Metal
	Meditite	—	Telepathy
	Medicham	—	Telepathy
	Electrike	—	Minus
	Manectric	—	Minus
	Plusle	Static	Lightning Rod
	Minun	Static	Volt Absorb
	Volbeat	—	Prankster
	Illumise	—	Prankster
	Roselia	—	Leaf Guard
	Gulpin	—	Gluttony
	Swalot	—	Gluttony
	Wailmer	—	Water Veil
	Wailord	—	Water Veil
	Numel	—	Oblivious
	Camerupt	—	Magma Armor
	Torkoal	—	Shell Armor
	Spoink	—	Gluttony
	Grumpig	—	Gluttony
	Spinda	—	Contrary
	Trapinch	—	Sheer Force
	Zangoose	—	Toxic Boost
	Seviper	—	Infiltrator
	Barboach	—	Hydration
	Whiscash	—	Hydration
	Corphish	—	Hyper Cutter
	Crawdaunt	—	Hyper Cutter
	Feebas	—	Swift Swim
	Milotic	—	Marvel Scale
	Kecleon	—	Protean
	Shuppet	—	Cursed Body
	Banette	—	Cursed Body
	Duskull	—	Frisk
	Dusclops	—	Frisk
	Tropius	—	Harvest
	Absol	—	Justified
	Wynaut	—	Telepathy
	Snorunt	—	Moody
	Glalie	—	Moody
	Spheal	—	Oblivious
	Sealeo	—	Oblivious
	Walrein	—	Oblivious
	Clamperl	—	Rattled
	Huntail	—	Water Veil
	Gorebyss	—	Hydration
	Relicanth	—	Sturdy
	Bagon	—	Sheer Force
	Shelgon	—	Overcoat
	Salamence	—	Moxie
	Beldum	Rock Head	Light Metal
	Metang	Iron Fist	Light Metal
	Metagross	Iron Fist	Light Metal
	Registeel	Sturdy	Light Metal
	Jirachi	Magic Guard	—
	Piplup	Hustle	Competitive
	Prinplup	Hustle	Competitive
	Empoleon	Hustle	Competitive
	Starly	—	Reckless
	Bidoof	—	Moody
	Bibarel	—	Moody
	Shinx	—	Rivalry
	Luxio	—	Rivalry
	Luxray	—	Guts
	Budew	—	Natural Cure
	Roserade	—	Natural Cure
	Cranidos	Reckless	Sheer Force
	Rampardos	Reckless	Sheer Force
	Burmy	—	Overcoat
	Wormadam	—	Overcoat
	Vespiquen	Intimidate	Unnerve
	Pachirisu	—	Run Away
	Buizel	Technician	Water Veil
	Floatzel	Technician	Water Veil
	Shellos	—	Sand Force
	Gastrodon	—	Sand Force
	Ambipom	—	Skill Link
	Drifloon	—	Flare Boost
	Drifblim	—	Flare Boost
	Buneary	—	Run Away
	Lopunny	—	Cute Charm
	Honchkrow	—	Moxie
	Glameow	—	Keen Eye
	Purugly	—	Defiant
	Stunky	—	Keen Eye
	Skuntank	—	Keen Eye
	Bronzor	—	Heavy Metal
	Bronzong	—	Heavy Metal
	Bonsly	—	Rattled
	Mime Jr.	—	Technician
	Happiny	—	Friend Guard
	Chatot	Soundproof	Keen Eye, Big Pecks
	Spiritomb	—	Infiltrator
	Munchlax	—	Gluttony
	Riolu	—	Prankster
	Lucario	—	Justified
	Hippopotas	—	Sand Force
	Hippowdon	—	Sand Force
	Skorupi	—	Keen Eye
	Drapion	—	Keen Eye
	Croagunk	—	Poison Touch
	Toxicroak	—	Poison Touch
	Finneon	—	Water Veil
	Lumineon	—	Water Veil
	Mantyke	—	Water Veil
	Weavile	Technician	Pickpocket
	Magnezone	—	Analytic
	Lickilicky	—	Oblivious
	Rhyperior	—	Lightning Rod
	Tangrowth	—	Regenerator
	Togekiss	—	Super Luck
	Yanmega	—	Frisk
	Leafeon	Natural Cure	Chlorophyll
	Glaceon	Serene Grace	Ice Body
	Gliscor	—	Sand Veil
	Mamoswine	—	Oblivious
	Porygon-Z	—	Analytic
	Gallade	—	Justified
	Probopass	—	Sand Force
	Dusknoir	—	Frisk
	Froslass	—	Cursed Body
	Dialga	—	Telepathy
	Palkia	—	Telepathy
	Regigigas	Pressure	—
	Giratina	—	Telepathy