Home | Contact Me | Support the Site |

Main Series Home | Gold, Silver, and Crystal Home

Gold, Silver, and Crystal Minimum Levels (All Games)

This is a list of the lowest level at which you can obtain every Pokémon in Gold, Silver, and Crystal. It does not contain levels attainable via glitches. However, it does assume you have access to all of Red, Green, Blue, Yellow, Gold, Silver, Crystal, Pokémon Stadium, and Pokémon Stadium 2.
Some Pokémon can be found at slightly different lowest levels depending on whether the player has access to Japanese Blue or not. Use the radio buttons above to switch between the Japanese games (RGBY) and the international games (RBY).

Gold, Silver, and Crystal Minimum Levels (All Games)
Pokémon Level Games Method of Obtaining
Bulbasaur
Bulbasaur 5 Red, Blue Gift: Professor Oak's Lab
Gold, Silver, Crystal Breed Bulbasaur, Ivysaur, or Venusaur
Stadium Gift: Complete Gym Leader Castle
Ivysaur
Ivysaur 16 Any Evolve Bulbasaur
Venusaur
Venusaur 32 Any Evolve Ivysaur
Charmander
Charmander 5 Red, Blue Gift: Professor Oak's Lab
Gold, Silver, Crystal Breed Charmander, Charmeleon, or Charizard
Stadium Gift: Complete Gym Leader Castle
Charmeleon
Charmeleon 16 Any Evolve Charmander
Charizard
Charizard 36 Any Evolve Charmeleon
Squirtle
Squirtle 5 Red, Blue Gift: Professor Oak's Lab
Gold, Silver, Crystal Breed Squirtle, Wartortle, or Blastoise
Stadium Gift: Complete Gym Leader Castle
Wartortle
Wartortle 16 Any Evolve Squirtle
Blastoise
Blastoise 36 Any Evolve Wartortle
Caterpie
Caterpie 3 Red, Yellow Walking: Viridian Forest
Blue Walking: Route 2, Viridian Forest
Gold, Crystal Walking: Routes 30, 2
Metapod
Metapod 4 Red, Blue, Yellow Walking: Viridian Forest
Gold Walking: Route 30
Butterfree
Butterfree 7 Gold, Crystal Walking: Route 2
Weedle
Weedle 3 Red Walking: Viridian Forest
Blue Walking: Route 2, Viridian Forest
Silver Walking: Routes 30 and 2
Crystal Walking: Route 30
Kakuna
Kakuna 4 Red, Blue Walking: Viridian Forest
Silver Walking: Route 30
Beedrill
Beedrill 7 Silver Walking: Route 2
Pidgey
Pidgey 2 Red, Blue, Yellow Walking: Route 1
Gold, Silver Walking: Routes 29, 30, and 1
Crystal Walking: Routes 29 and 1
Pidgeotto
Pidgeotto 7 Gold, Silver, Crystal Walking: Route 2
Pidgeot
Pidgeot 36 Any Evolve Pidgeotto
Rattata
Rattata 2 Red, Blue Walking: Routes 1, 2, and 22
Yellow Walking: Route 1
Gold, Silver, Crystal Walking: Routes 29, 46, and 1
Raticate
Raticate 6 Crystal Walking: Route 1
Spearow
Spearow 2 Yellow Walking: Route 22
Gold, Silver, Crystal Walking: Route 46
Fearow
Fearow 7 Gold, Silver, Crystal Walking: Route 22
Ekans
Ekans 4 Silver, Crystal Walking: Route 32
Arbok
Arbok 10 Silver, Crystal Walking: Routes 3 and 4
Pikachu
Pikachu 3 Red, Blue Walking: Viridian Forest
Raichu
Raichu 3 Any Evolve Pikachu
Sandshrew
Sandshrew 5 Gold, Silver, Crystal Breed Sandshrew or Sandslash
Sandslash
Sandslash 10 Gold Walking: Mt. Moon
Nidoran♀
Nidoran♀ 2 Red In-Game Trade: Route 5-6 Underground Path (trade a level 2 Nidoran♂)
Blue, Yellow Walking: Route 22
Nidorina
Nidorina 16 Any Evolve Nidoran♀
Red, Blue In-Game Trade: Route 11 (trade a level 16 Nidorino)
Nidoqueen
Nidoqueen 16 Any Evolve Nidorina
Nidoran♂
Nidoran♂ 2 Red, Yellow Walking: Route 22
Nidorino
Nidorino 16 Any Evolve Nidoran♂
Nidoking
Nidoking 16 Any Evolve Nidorino
Clefairy
Clefairy 6 Gold, Silver, Crystal Evolve Cleffa
Crystal Walking: Routes 3 and 4
Clefable
Clefable 6 Any Evolve Clefairy
Vulpix
Vulpix 5 Gold, Silver, or Crystal Breed Vulpix or Ninetales
Ninetales
Ninetales 5 Any Evolve Vulpix
Jigglypuff
Jigglypuff 3 Red, Blue Walking: Route 3
Yellow Walking: Routes 5 and 6
Gold, Silver Walking: Route 46
Wigglytuff
Wigglytuff 3 Any Evolve Jigglypuff
Zubat
Zubat 2 Gold, Silver, Crystal Walking: Dark Cave (Route 31/46 side)
Golbat
Golbat 13 Crystal Walking: Mt. Mortar 1F front
Oddish
Oddish 5 Gold, Silver, Crystal Breed Oddish, Gloom, Vileplume, or Bellossom
Walking: Ilex Forest
Gloom
Gloom 14 Crystal Walking: Route 24
Vileplume
Vileplume 14 Any Evolve Gloom
Paras
Paras 5 Gold, Silver, Crystal Breed Paras or Parasect
Gold, Silver Walking: Ilex Forest
Parasect
Parasect 5 Yellow In-Game Trade: Route 18 (trade a level 5 Tangela from Red, Blue, Gold, Silver, or Crystal)
Venonat
Venonat 5 Gold, Silver, Crystal Breed Venonat or Venomoth
Crystal Walking: Ilex Forest
Venomoth
Venomoth 10 Gold, Silver Walking: Routes 24 and 25
Diglett
Diglett 2 Crystal Walking: Diglett's Cave
Dugtrio
Dugtrio 5 Yellow In-Game Trade: Power Plant (trade a level 5 Lickitung from Gold, Silver, or Crystal)
Meowth
Meowth 5 Gold, Silver, Crystal Breed Meowth or Persian
Persian
Persian 18 Crystal Walking: Route 7
Psyduck
Psyduck 5 Gold, Silver, Crystal Breed Psyduck or Golduck
Surfing: Route 6
Golduck
Golduck 10 Gold, Silver, Crystal Surfing: Route 6
Mankey
Mankey 3 Yellow Walking: Route 22
Primeape
Primeape 15 Gold Walking: Route 9
Growlithe
Growlithe 5 Gold, Silver, Crystal Breed Growlithe or Arcanine
Crystal Walking: Route 36
Arcanine
Arcanine 5 Any Evolve Growlithe
Poliwag
Poliwag 3 Crystal Walking: Route 22
Poliwhirl
Poliwhirl 10 Gold, Silver, Crystal Surfing: Viridian City, Route 22
Poliwrath
Poliwrath 10 Any Evolve Poliwhirl
Abra
Abra 5 Gold, Silver, Crystal Breed Abra, Kadabra, or Alakazam
Crystal Purchase: Goldenrod Game Corner
Kadabra
Kadabra 15 Gold, Silver Walking: Route 8
16 Crystal Evolve Abra
Walking: Route 8
Alakazam
Alakazam 15 Any Evolve Kadabra via trading
Machop
Machop 5 Gold, Silver, Crystal Breed Machop, Machoke, or Machamp
In-Game Trade: Goldenrod Department Store (trade a level 5 Drowzee or Abra)
Machoke
Machoke 14 Gold, Silver Walking: Rock Tunnel 1F
15 Crystal Walking: Rock Tunnel 1F
Machamp
Machamp 5 Yellow In-Game Trade: Route 5-6 Underground Path (trade a level 5 Cubone from Gold, Silver, or Crystal; you cannot stop Machoke's evolution into Machamp)
Bellsprout
Bellsprout 3 Gold, Silver Walking: Route 31
Weepinbell
Weepinbell 12 Gold, Silver Walking: Route 24
Victreebel
Victreebel 12 Any Evolve Weepinbell
Tentacool
Tentacool 5 Red, Blue Surfing: Routes 19, 20, and 21
Fishing (Super Rod): Routes 12, 13, 17, and 18
Yellow Surfing: Routes 19, 20, and 21
Fishing (Super Rod): Route 17
Gold, Silver, Crystal Breed Tentacool or Tentacruel
Tentacruel
Tentacruel 20 Yellow Fishing (Super Rod): Route 20
Gold, Silver, Crystal Surfing: New Bark Town, Cherrygrove City, Olivine City, Cianwood City, Routes 32, 34, 40, 41, and 27, Union Cave B2F, Whirl Islands 1F, B2F, and Lugia's Room
Geodude
Geodude 2 Gold, Silver, Crystal Walking: Route 46, Dark Cave (Route 31/46 side)
Graveler
Graveler 23 Gold, Silver, Crystal Walking: Route 45
Golem
Golem 23 Any Evolve Graveler via trading
Ponyta
Ponyta 5 Gold, Silver, Crystal Breed Ponyta or Rapidash
Rapidash
Rapidash 14 Gold, Silver In-Game Trade: Pewter City (trade a level 14 Gloom from Crystal)
Slowpoke
Slowpoke 5 Gold, Silver, Crystal Breed Slowpoke, Slowbro, or Slowking
Slowbro
Slowbro 15 Yellow Surfing: Routes 12 and 13
Magnemite
Magnemite 5 Gold, Silver, Crystal Breed Magnemite or Magneton
Magneton
Magneton 5 Crystal In-Game Trade: Power Plant (trade a level 5 Dugtrio from Yellow)
Farfetch'd
Farfetch'd 2 Red, Blue In-Game Trade: Vermilion City (trade a level 2 Spearow from Yellow, Gold, Silver, or Crystal)
Doduo
Doduo 4 Gold, Silver, Crystal Walking: Route 22
Dodrio
Dodrio 10 Crystal In-Game Trade: Blackthorn City (trade a level 10 Dragonair)
Seel
Seel 5 Red, Blue In-Game Trade: Cinnabar Island (trade a level 5 Ponyta from Gold, Silver, or Crystal)
Gold, Silver, Crystal Breed Seel or Dewgong
Dewgong
Dewgong 5 Yellow In-Game Trade: Cinnabar Lab (trade a level 5 Growlithe from Gold, Silver, or Crystal)
Grimer
Grimer 5 Gold, Silver, Crystal Breed Grimer or Muk
Muk
Muk 5 Yellow In-Game Trade: Cinnabar Lab (trade a level 5 Kangaskhan from Gold, Silver, or Crystal)
Shellder
Shellder 5 Gold, Silver, Crystal Breed Shellder or Cloyster
Cloyster
Cloyster 5 Any Evolve Shellder
Gastly
Gastly 3 Gold, Silver, Crystal Walking: Sprout Tower 2F and 3F
Haunter
Haunter 20 Gold, Silver Walking: Route 8
15 Crystal Walking: Rock Tunnel B1F
Gengar
Gengar 15 Any Evolve Haunter via trading
Onix
Onix 3 Gold, Silver In-Game Trade: Violet City (trade a level 3 Bellsprout)
Drowzee
Drowzee 5 Gold, Silver, Crystal Breed Drowzee or Hypno
Hypno
Hypno 16 Gold, Silver, Crystal Walking: Route 11
Krabby
Krabby 5 Gold, Silver, Crystal Breed Krabby or Kingler
Kingler
Kingler 15 Yellow Fishing (Super Rod): Route 25
Voltorb
Voltorb 5 Gold, Silver, Crystal Breed Voltorb or Electrode
In-Game Trade: Olivine City (trade a level 5 Krabby)
Electrode
Electrode 3 Red, Blue In-Game Trade: Cinnabar Lab (trade a level 3 Raichu)
Exeggcute
Exeggcute 5 Gold, Silver, Crystal Breed Exeggcute or Exeggutor
Exeggutor
Exeggutor 5 Any Evolve Exeggcute
Cubone
Cubone 5 Gold, Silver, Crystal Breed Cubone or Marowak
Marowak
Marowak 12 Crystal Walking: Rock Tunnel 1F
Hitmonlee
Hitmonlee 20 Gold, Silver, Crystal Evolve Tyrogue
Stadium Gift: Complete Gym Leader Castle
Hitmonchan
Hitmonchan 20 Gold, Silver, Crystal Evolve Tyrogue
Stadium Gift: Complete Gym Leader Castle
Lickitung
Lickitung 5 Gold, Silver, Crystal Breed Lickitung
Koffing
Koffing 5 Gold, Silver, Crystal Breed Koffing or Weezing
Weezing
Weezing 16 Crystal Walking: Burned Tower B1F
Rhyhorn
Rhyhorn 5 Gold, Silver, Crystal Breed Rhyhorn or Rhydon
Rhydon
Rhydon 10 Yellow In-Game Trade: Cinnabar Lab (trade a level 10 Golduck from Gold, Silver, or Crystal)
Gold, Silver In-Game Trade: Blackthorn City (trade a level 10 Dragonair)
Chansey
Chansey 5 Gold, Silver, Crystal Breed Chansey
Tangela
Tangela 5 Red, Blue In-Game Trade: Cinnabar Lab (trade a level 5 Venonat from Gold, Silver, or Crystal)
Gold, Silver, Crystal Breed Tangela
Kangaskhan
Kangaskhan 5 Gold, Silver, Crystal Breed Kangaskhan
Horsea
Horsea 5 Yellow Fishing (Super Rod): Vermilion City, Route 11
Gold, Silver, Crystal Breed Horsea, Seadra, or Kingdra
Seadra
Seadra 20 Yellow Fishing (Super Rod): Route 13
Gold, Silver, Crystal Surfing: Whirl Islands Lugia's Room
Goldeen
Goldeen 5 Yellow Fishing (Super Rod): Celadon City, Route 6
Gold, Silver, Crystal Breed Goldeen or Seaking
Surfing: Cerulean City, Routes 4, 24, and 25
Seaking
Seaking 10 Gold, Silver, Crystal Surfing: Cerulean City, Routes 4, 24, and 25
Staryu
Staryu 5 Yellow Fishing (Super Rod): Pallet Town
Gold, Silver, Crystal Breed Staryu or Starmie
Starmie
Starmie 5 Any Evolve Staryu
Mr. Mime
Mr. Mime 5 Gold, Silver, Crystal Breed Mr. Mime
Scyther
Scyther 5 Gold, Silver, Crystal Breed Scyther or Scizor
Jynx
Jynx 10 Red, Blue In-Game Trade: Cerulean City (trade a level 10 Poliwhirl from Gold, Silver, or Crystal)
Electabuzz
Electabuzz 15 Gold, Silver Walking: Route 10
Magmar
Magmar 14 Gold, Silver Walking: Burned Tower B1F
Pinsir
Pinsir 5 Gold, Silver, Crystal Breed Pinsir
Tauros
Tauros 5 Gold, Silver, Crystal Breed Tauros
Magikarp
Magikarp 5 Red, Blue Purchase: Route 4
Fishing (Old Rod): Any Fishing location
Yellow Purchase: Route 4
Fishing (Old Rod): Any Fishing location
Fishing (Super Rod): Fuchsia City, Safari Zone (all areas)
Gold, Silver, Crystal Breed Magikarp or Gyarados
Surfing: Blackthorn City, Route 45, Dark Cave (all areas)
Fishing (Old Rod): Route 32 (only during a swarm)
Gyarados
Gyarados 15 Yellow Fishing (Super Rod): Fuchsia City
Gold, Silver, Crystal Surfing: Lake of Rage
Lapras
Lapras 5 Gold, Silver, Crystal Breed Lapras
Ditto
Ditto 10 Gold, Silver, Crystal Walking: Routes 34 and 35
Eevee
Eevee 5 Gold, Silver, Crystal Breed Eevee, Vaporeon, Jolteon, Flareon, Espeon, or Umbreon
Vaporeon
Vaporeon 5 Any Evolve Eevee
Jolteon
Jolteon 5 Any Evolve Eevee
Flareon
Flareon 5 Any Evolve Eevee
Porygon
Porygon 5 Gold, Silver, Crystal Breed Porygon or Porygon2
Omanyte
Omanyte 5 Gold, Silver, Crystal Breed Omanyte or Omastar
Omastar
Omastar 40 Any Evole Omanyte
Kabuto
Kabuto 5 Gold, Silver, Crystal Breed Kabuto or Kabutops
Kabutops
Kabutops 40 Any Evolve Kabuto
Aerodactyl
Aerodactyl 5 Gold, Silver, Crystal Breed Aerodactyl
In-Game Trade: Route 14 (trade a level 5 Chansey)
Snorlax
Snorlax 5 Gold, Silver, Crystal Breed Snorlax
Articuno
Articuno 50 Red, Blue, Yellow Static: Seafoam Islands B4F
Zapdos
Zapdos 50 Red, Blue, Yellow Static: Power Plant
Moltres
Moltres 50 Red, Blue, Yellow Static: Victory Road 2F
Dratini
Dratini 5 Gold, Silver, Crystal Breed Dratini, Dragonair, or Dragonite
Dragonair
Dragonair 10 Gold, Silver, Crystal Fishing (Super Rod): Route 45
Dragonite
Dragonite 55 Any Evolve Dragonair
Mewtwo
Mewtwo 70 Red, Blue, Yellow Static: Cerulean Cave B1F
Mew
Mew 5 N/A The only way to obtain Mew without glitches or hacking was to receive it in an event for a physical copy of Red, Blue, Yellow, Gold, Silver, or Crystal between 1996 and 2002, or for the Virtual Console rerelease of Red, Blue, and Yellow in 2016. In all known distributions, it was level 5.
Chikorita
Chikorita 5 Gold, Silver, Crystal Gift: Professor Elm's Lab
Bayleef
Bayleef 16 Gold, Silver, Crystal Evolve Chikorita
Meganium
Meganium 32 Gold, Silver, Crystal Evolve Bayleef
Cyndaquil
Cyndaquil 5 Gold, Silver, Crystal Gift: Professor Elm's Lab
Quilava
Quilava 14 Gold, Silver, Crystal Evolve Cyndaquil
Typhlosion
Typhlosion 36 Gold, Silver, Crystal Evolve Quilava
Totodile
Totodile 5 Gold, Silver, Crystal Gift: Professor Elm's Lab
Croconaw
Croconaw 18 Gold, Silver, Crystal Evolve Totodile
Feraligatr
Feraligatr 30 Gold, Silver, Crystal Evolve Croconaw
Sentret
Sentret 2 Gold, Silver, Crystal Walking: Route 29
Furret
Furret 6 Gold, Silver, Crystal Gift: Route 1
Hoothoot
Hoothoot 2 Gold, Crystal Walking: Routes 29 and 1
Silver Walking: Routes 29, 30, and 1
Noctowl
Noctowl 4 Crystal Walking: Route 2
Ledyba
Ledyba 3 Silver, Crystal Walking: Routes 30 and 2
Ledian
Ledian 7 Silver, Crystal Walking: Route 2
Spinarak
Spinarak 3 Gold, Crystal Walking: Routes 30 and 2
Ariados
Ariados 7 Gold, Crystal Walking: Route 2
Crobat
Crobat 14 Gold, Silver, Crystal Evolve Golbat
Chinchou
Chinchou 5 Gold, Silver, Crystal Breed Chinchou or Lanturn
Lanturn
Lanturn 27 Gold, Silver, Crystal Evolve Chinchou
Pichu
Pichu 5 Gold, Silver, Crystal Breed Pikachu or Raichu
Crystal Gift: Route 34 (Odd Egg)
Cleffa
Cleffa 5 Gold, Silver, Crystal Breed Clefairy or Clefable
Crystal Gift: Route 34 (Odd Egg)
Igglybuff
Igglybuff 5 Gold, Silver, Crystal Breed Jigglypuff or Wigglytuff
Crystal Gift: Route 34 (Odd Egg)
Togepi
Togepi 5 Gold, Silver, Crystal Breed Togetic
Gift: Violet City
Togetic
Togetic 6 Gold, Silver, Crystal Evolve Togepi
Natu
Natu 5 Gold, Silver, Crystal Breed Natu or Xatu
Xatu
Xatu 15 Crystal In-Game Trade: Pewter City (trade a level 15 Haunter)
Mareep
Mareep 5 Gold, Silver, Crystal Breed Mareep, Flaaffy, or Ampharos
Flaaffy
Flaaffy 15 Gold, Silver, Crystal Evolve Mareep
Gold, Silver Walking: Routes 42 and 43
Ampharos
Ampharos 30 Gold, Silver, Crystal Evolve Flaaffy
Bellossom
Bellossom 14 Gold, Silver, Crystal Evolve Gloom
Marill
Marill 5 Gold, Silver, Crystal Breed Marill or Azumarill
Azumarill
Azumarill 18 Gold, Silver, Crystal Evolve Marill
Sudowoodo
Sudowoodo 5 Gold, Silver, Crystal Breed Sudowoodo
Politoed
Politoed 10 Gold, Silver, Crystal Evolve Poliwhirl via trading
Hoppip
Hoppip 3 Crystal Walking: Route 29
Skiploom
Skiploom 18 Gold, Silver, Crystal Evolve Hoppip
Jumpluff
Jumpluff 27 Gold, Silver Crystal Evolve Skiploom
Aipom
Aipom 5 Gold, Silver, Crystal Breed Aipom
Sunkern
Sunkern 5 Gold, Silver, Crystal Breed Sunkern or Sunflora
Sunflora
Sunflora 5 Gold, Silver, Crystal Evolve Sunkern
Yanma
Yanma 5 Gold, Silver, Crystal Breed Yanma
Wooper
Wooper 4 Gold, Silver, Crystal Walking: Route 32
Quagsire
Quagsire 15 Gold, Silver, Crystal Surfing: Ruins of Alph Outside, Union Cave 1F and B1F
Espeon
Espeon 6 Gold, Silver, Crystal Evolve Eevee
Umbreon
Umbreon 6 Gold, Silver, Crystal Evolve Eevee
Murkrow
Murkrow 5 Gold, Silver, Crystal Breed Murkrow
Slowking
Slowking 5 Gold, Silver, Crystal Evolve Slowpoke via trading
Misdreavus
Misdreavus 5 Gold, Silver, Crystal Breed Misdreavus
Unown
Unown 5 (all forms) Gold, Silver, Crystal Walking: Ruins of Alph Inside
Wobbuffet
Wobbuffet 5 Gold, Silver, Crystal Breed Wobbuffet
Girafarig
Girafarig 5 Gold, Silver, Crystal Breed Girafarig
Pineco
Pineco 5 Gold, Silver, Crystal Breed Pineco or Forretress
Forretress
Forretress 31 Gold, Silver, Crystal Evolve Pineco
Dunsparce
Dunsparce 2 Gold, Silver, Crystal Walking: Dark Cave (Route 31/46 side)
Gligar
Gligar 5 Gold, Silver, Crystal Breed Gligar
Stadium 2 Gift: Defeat Round 2 Rival
Steelix
Steelix 3 Gold, Silver, Crystal Evolve Onix via trading
Snubbull
Snubbull 5 Gold, Silver, Crystal Breed Snubbull or Granbull
Granbull
Granbull 15 Crystal Walking: Route 6
Qwilfish
Qwilfish 5 Gold, Silver, Crystal Breed Qwilfish
Fishing (Old Rod): Route 32
Scizor
Scizor 5 Gold, Silver, Crystal Evolve Scyther via trading
Shuckle
Shuckle 5 Gold, Silver, Crystal Breed Shuckle
Heracross
Heracross 5 Gold, Silver, Crystal Breed Heracross
Sneasel
Sneasel 5 Gold, Silver, Crystal Breed Sneaasel
Teddiursa
Teddiursa 2 Crystal Walking: Dark Cave (Route 31/46 side)
Ursaring
Ursaring 25 Crystal Walking: Dark Cave (Route 45 side)
Slugma
Slugma 5 Gold, Silver, Crystal Breed Slugma or Magcargo
Magcargo
Magcargo 38 Gold, Silver, Crystal Evolve Slugma
Swinub
Swinub 5 Gold, Silver, Crystal Breed Swinub or Piloswine
Piloswine
Piloswine 33 Gold, Silver, Crystal Evolve Swinub
Corsola
Corsola 5 Gold, Silver, Crystal Breed Corsola
Remoraid
Remoraid 5 Gold, Silver, Crystal Breed Remoraid or Octillery
Octiller
Octillery 25 Gold, Silver, Crystal Evolve Remoraid
Delibird
Delibird 5 Gold, Silver, Crystal Breed Delibird
Mantine
Mantine 5 Gold, Silver, Crystal Breed Mantine
Skarmory
Skarmory 5 Gold, Silver, Crystal Breed Skarmory
Houndour
Houndour 5 Gold, Silver, Crystal Breed Houndour or Houndoom
Houndoom
Houndoom 24 Gold, Silver, Crystal Evolve Houndour
Kingdra
Kingdra 20 Gold, Silver, Crystal Evolve Seadra via trading
Phanpy
Phanpy 2 Crystal Walking: Route 46
Donphan
Donphan 25 Gold, Silver, Crystal Evolve Phanpy
Crystal Walking: Route 45
Porygon2
Porygon2 5 Gold, Silver, Crystal Evolve Porygon via trading
Stantler
Stantler 5 Gold, Silver, Crystal Breed Stantler
Smeargle
Smeargle 5 Gold, Silver, Crystal Breed Smeargle
Tyrogue
Tyrogue 5 Gold, Silver, Crystal Breed Hitmonlee, Hitmonchan, or Hitmontop
Crystal Gift: Route 34 (Odd Egg)
Hitmontop
Hitmontop 20 Gold, Silver, Crystal Evolve Tyrogue
Smoochum
Smoochum 5 Gold, Silver, Crystal Breed Jynx
Crystal Gift: Route 34 (Odd Egg)
Elekid
Elekid 5 Gold, Silver, Crystal Breed Electabuzz
Crystal Gift: Route 34 (Odd Egg)
Magby
Magby 5 Gold, Silver, Crystal Breed Magmar
Crystal Gift: Route 34 (Odd Egg)
Miltank
Miltank 5 Gold, Silver, Crystal Breed Miltank
Blissey
Blissey 6 Gold, Silver, Crystal Evolve Chansey
Raikou
Raikou 40 Gold, Silver, Crystal Walking: Roaming Legend
Entei
Entei 40 Gold, Silver, Crystal Walking: Roaming Legend
Suicune
Suicune 40 Gold, Silver Walking: Roaming Legend
Crystal Static: Tin Tower 1F
Larvitar
Larvitar 5 Gold, Silver, Crystal Breed Larvitar, Pupitar, or Tyranitar
Pupitar
Pupitar 20 Crystal Walking: Mt. Silver Summit
Tyranitar
Tyranitar 55 Gold, Silver, Crystal Evolve Pupitar
Lugia
Lugia 40 Silver Static: Whirl Islands B3F
Ho-Oh
Ho-Oh 40 Gold Static: Tin Tower 10F
Celebi
Celebi 5 Gold, Silver, Crystal The GS Ball that gave access to the event in Ilex Forest was only available without glitches or hacking in the Japanese version of Crystal, through connecting to the Mobile System GB (discontinued in 2002), and in all regions' Virtual Console releases of Crystal. The Celebi obtained via this event was level 30.
Otherwise, Celebi could only be obtained without glitches or hacking in events between 2000 and 2003. In all known distributions, it was level 5.
30 Crystal