How to evolve every Pokémon in Pokémon Classic

87 species with a recorded evolution method, taken from Pokémon Classic's own documentation.

Trade evolutions (10)

These are the evolutions in this guide's data that mention trading.

• Poliwhirl — Evolves into Politoed by trade while holding a King's Rock
• Kadabra — Evolves into Alakazam by trade
• Machoke — Evolves into Machamp by trade
• Graveler — Evolves into Golem by trade
• Slowpoke — Evolves into Slowking by trade while holding a King's Rock
• Haunter — Evolves into Gengar by trade
• Onix — Evolves into Steelix by trade while holding a Metal Coat
• Seadra — Evolves into Kingdra by trade while holding a Dragon Scale
• Scyther — Evolves into Scizor by trade while holding a Metal Coat
• Porygon — Evolves into Porygon2 by trade while holding a Up-Grade

Every evolution method (87)

	Pokémon	Evolves
	Bulbasaur	Evolves into Ivysaur at Level 16
	Ivysaur	Evolves into Venusaur at Level 32
	Venusaur	Mega Evolves while holding a Venusaurite
	Charmander	Evolves into Charmeleon at Level 16
	Charmeleon	Evolves into Charizard at Level 36
	Charizard	Mega Evolves while holding a Charizardite X Mega Evolves while holding a Charizardite Y
	Squirtle	Evolves into Wartortle at Level 16
	Wartortle	Evolves into Blastoise at Level 36
	Blastoise	Mega Evolves while holding a Blastoisinite
	Caterpie	Evolves into Metapod at Level 7
	Metapod	Evolves into Butterfree at Level 10
	Weedle	Evolves into Kakuna at Level 7
	Kakuna	Evolves into Beedrill at Level 10
	Beedrill	Mega Evolves while holding a Beedrillite
	Pidgey	Evolves into Pidgeotto at Level 18
	Pidgeotto	Evolves into Pidgeot at Level 36
	Pidgeot	Mega Evolves while holding a Pidgeotite
	Rattata	Evolves into Raticate at Level 20
	Spearow	Evolves into Fearow at Level 20
	Ekans	Evolves into Arbok at Level 22
	Pikachu	Evolves into Raichu with a Thunder Stone
	Sandshrew	Evolves into Sandslash at Level 22
	Nidoran♀	Evolves into Nidorina at Level 16
	Nidorina	Evolves into Nidoqueen with a Moon Stone
	Nidoran♂	Evolves into Nidorino at Level 16
	Nidorino	Evolves into Nidoking with a Moon Stone
	Clefairy	Evolves into Clefable with a Moon Stone
	Vulpix	Evolves into Ninetales with a Fire Stone
	Jigglypuff	Evolves into Wigglytuff with a Moon Stone
	Zubat	Evolves into Golbat at Level 22
	Oddish	Evolves into Gloom at Level 21
	Gloom	Evolves into Vileplume with a Leaf Stone
	Paras	Evolves into Parasect at Level 24
	Venonat	Evolves into Venomoth at Level 31
	Diglett	Evolves into Dugtrio at Level 26
	Meowth	Evolves into Persian at Level 28
	Psyduck	Evolves into Golduck at Level 33
	Mankey	Evolves into Primeape at Level 28
	Growlithe	Evolves into Arcanine with a Fire Stone
	Poliwag	Evolves into Poliwhirl at Level 25
	Poliwhirl	Evolves into Poliwrath with a Water Stone Evolves into Politoed by trade while holding a King's Rock
	Abra	Evolves into Kadabra at Level 16
	Kadabra	Evolves into Alakazam by trade Evolves into Alakazam with a Power Stone
	Alakazam	Mega Evolves while holding a Alakazite
	Machop	Evolves into Machoke at Level 28
	Machoke	Evolves into Machamp by trade Evolves into Machamp with a Power Stone
	Bellsprout	Evolves into Weepinbell at Level 21
	Weepinbell	Evolves into Victreebel with a Leaf Stone
	Tentacool	Evolves into Tentacruel at Level 30
	Geodude	Evolves into Graveler at Level 25
	Graveler	Evolves into Golem by trade Evolves into Golem with a Power Stone
	Ponyta	Evolves into Rapidash at Level 40
	Slowpoke	Evolves into Slowbro at Level 37 Evolves into Slowking by trade while holding a King's Rock
	Slowbro	Mega Evolves while holding a Slowbronite
	Magnemite	Evolves into Magneton at Level 30
	Doduo	Evolves into Dodrio at Level 31
	Seel	Evolves into Dewgong at Level 34
	Grimer	Evolves into Muk at Level 38
	Shellder	Evolves into Cloyster with a Water Stone
	Gastly	Evolves into Haunter at Level 25
	Haunter	Evolves into Gengar by trade Evolves into Gengar with a Power Stone
	Gengar	Mega Evolves while holding a Gengarite
	Onix	Evolves into Steelix by trade while holding a Metal Coat
	Drowzee	Evolves into Hypno at Level 26
	Krabby	Evolves into Kingler at Level 28
	Voltorb	Evolves into Electrode at Level 30
	Exeggcute	Evolves into Exeggutor with a Leaf Stone
	Cubone	Evolves into Marowak at Level 28
	Koffing	Evolves into Weezing at Level 35
	Rhyhorn	Evolves into Rhydon at Level 42
	Kangaskhan	Mega Evolves while holding a Kangaskhanite
	Horsea	Evolves into Seadra at Level 32
	Seadra	Evolves into Kingdra by trade while holding a Dragon Scale
	Goldeen	Evolves into Seaking at Level 33
	Staryu	Evolves into Starmie with a Water Stone
	Scyther	Evolves into Scizor by trade while holding a Metal Coat
	Pinsir	Mega Evolves while holding a Pinsirite
	Magikarp	Evolves into Gyarados at Level 20
	Gyarados	Mega Evolves while holding a Gyaradosite
	Eevee	Evolves into Jolteon with a Thunder Stone Evolves into Vaporeon with a Water Stone Evolves into Flareon with a Fire Stone
	Porygon	Evolves into Porygon2 by trade while holding a Up-Grade
	Omanyte	Evolves into Omastar at Level 40
	Kabuto	Evolves into Kabutops at Level 40
	Aerodactyl	Mega Evolves while holding a Aerodactylite
	Dratini	Evolves into Dragonair at Level 30
	Dragonair	Evolves into Dragonite at Level 55
	Mewtwo	Mega Evolves while holding a Mewtwonite X Mega Evolves while holding a Mewtwonite Y

No evolution line recorded (81)

Either these don't evolve, or this hack's documentation never said how. The guide won't guess.