# Pokémon Red and Blue/Encounter Rates

Here you will find a centralized list of which Pokémon can be found in the various locations in the game.

### Route 1

In the tall grass
* 016 - Pidgey
** Pokémon Red: 55% encounter rate
** Pokémon Blue: 55% encounter rate
* 019 - Rattata
** Pokémon Red: 45% encounter rate
** Pokémon Blue: 45% encounter rate

### Route 2

In the tall grass
* 010 - Caterpie
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 013 - Weedle
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 016 - Pidgey
** Pokémon Red: 40% encounter rate
** Pokémon Blue: 40% encounter rate
* 019 - Rattata
** Pokémon Red: 45% encounter rate
** Pokémon Blue: 45% encounter rate

### Route 3

In the tall grass
* 016 - Pidgey
** Pokémon Red: 50% encounter rate
** Pokémon Blue: 50% encounter rate
* 021 - Spearow
** Pokémon Red: 40% encounter rate
** Pokémon Blue: 40% encounter rate
* 039 - Jigglypuff
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate

### Route 4

In the tall grass
* 019 - Rattata
** Pokémon Red: 45% encounter rate
** Pokémon Blue: 45% encounter rate
* 021 - Spearow
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 023 - Ekans
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 027 - Sandshrew
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate

### Route 5 & Route 6

In the tall grass
* 016 - Pidgey
** Pokémon Red: 35% encounter rate
** Pokémon Blue: 35% encounter rate
* 043 - Oddish
** Pokémon Red: 40% encounter rate
** Pokémon Blue: Does not appear
* 052 - Meowth
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 056 - Mankey
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 40% encounter rate

### Route 7

In the tall grass
* 026 - Pidgey
** Pokémon Red: 35% encounter rate
** Pokémon Blue: 35% encounter rate
* 037 - Vulpix
** Pokémon Red: Does not appear
** Pokémon Blue: 10% encounter rate
* 043 - Oddish
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 052 - Meowth
** Pokémon Red: Does not appear
** Pokémon Blue: 30% encounter rate
* 056 - Mankey
** Pokémon Red: 30% encounter rate
** Pokémon Blue: Does not appear
* 058 - Growlithe
** Pokémon Red: 10% encounter rate
** Pokémon Blue: Does not appear

### Route 8

In the tall grass
* 016 - Pidgey
** Pokémon Red: 35% encounter rate
** Pokémon Blue: 35% encounter rate
* 023 - Ekans
** Pokémon Red: 20% encounter rate
** Pokémon Blue: Does not appear
* 027 - Sandshrew
** Pokémon Red: Does not appear
** Pokémon Blue: 20% encounter rate
* 037 - Vulpix
** Pokémon Red: Does not appear
** Pokémon Blue: 20% encounter rate
* 052 - Meowth
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 056 - Mankey
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 058 - Growlithe
** Pokémon Red: 20% encounter rate
** Pokémon Blue: Does not appear

### Route 9

In the tall grass
* 021 - Spearow
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 019 - Rattata
** Pokémon Red: 45% encounter rate
** Pokémon Blue: 45% encounter rate
* 023 - Ekans
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 027 - Sandshrew
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate

### Route 10

In the tall grass
* 021 - Spearow
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 023 - Ekans
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 027 - Sandshrew
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 100 - Voltorb
** Pokémon Red: 45% encounter rate
** Pokémon Blue: 45% encounter rate

### Route 11

In the tall grass
* 021 - Spearow
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 023 - Ekans
** Pokémon Red: 45% encounter rate
** Pokémon Blue: Does not appear
* 027 - Sandshrew
** Pokémon Red: Does not appear
** Pokémon Blue: 45% encounter rate
* 096 - Drowzee
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Route 12

In the tall grass
* 016 - Pidgey
** Pokémon Red: 35% encounter rate
** Pokémon Blue: 35% encounter rate
* 047 - Venonat
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounte rate
* 043 - Oddish
** Pokémon Red: 40% encounter rate
** Pokémon Blue: Does not appear
* 044 - Gloom
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 40% encounter rate
* 070 - Weepinbell
** Pokémon Red: Does not appear
** Pokémon Blue: 5% encounter rate
Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Super Rod
* 072 - Tentacool
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 098 - Krabby
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 118 - Goldeen
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 127 - Magikarp
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Route 13

In the tall grass
* 016 - Pidgey
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 047 - Venonat
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 40% encounter rate
* 070 - Weepinbell
** Pokémon Red: Does not appear
** Pokémon Blue: 5% encounter rate
* 043 - Oddish
** Pokémon Red: 40% encounter rate
** Pokémon Blue: Does not appear
* 044 - Gloom
** Pokémon Red: 5% encounter rate
** Pokémon Blue: Does not appear
* 132 - Ditto
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Super Rod
* 072 - Tentacool
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 089 - Krabby
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 118 - Goldeen
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 129 - Magikarp
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Route 14 & Route 15

In the tall grass
* 016 - Pidgey
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 043 - Oddish
** Pokémon Red: 40% encounter rate
** Pokémon Blue: Does not appear
* 044 - Gloom
** Pokémon Red: 5% encounter rate
** Pokémon Blue: Does not appear
* 047 - Venonat
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 40% encounter rate
* 070 - Weepinbell
** Pokémon Red: 5% encounter rate
** Pokémon Blue: Does not appear
* 132 - Ditto
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate

### Route 16

In the tall grass
* 019 - Rattata
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 020 - Raticate
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 021 - Spearow
** Pokémon Red: 40% encounter rate
** Pokémon Blue: 40% encounter rate

### Route 17

In the tall grass
* 020 - Raticate
** Pokémon Red: 30% encounter rate
** Pokémon Blue: 30% encounter rate
* 021 - Spearow
** Pokémon Red: 40% encounter rate
** Pokémon Blue: 40% encounter rare
* 022 - Fearow
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 084 - Doduo
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Route 18

In the tall grass
* 020 - Raticate
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 021 - Spearow
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 022 - Fearow
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 084 - Doduo
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Super Rod
* 072 - Tentacool
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 098 - Krabby
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 118 - Goldeen
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 129 - Magikarp
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Route 19 & Route 20

* 072 - Tentacool
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate

### Route 21

In the tall grass
* 016 - Pidgey
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 019 - Rattata
** Pokémon Red: 35% encounter rate
** Pokémon Blue: 35% encounter rate
* 020 - Radicate
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 114 - Tangela
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
On the water surface
* 072 - Tentacool
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Super Rod
* 090 - Shellder
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 116 - Horsea
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 118 - Goldeen
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 120 - Staryu
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Route 22

In the tall grass
* 010 - Caterpie
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 013 - Weedle
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 016 - Pidgey
** Pokémon Red: 45% encounter rate
** Pokémon Blue: 45% encounter rate
* 019 - Rattata
** Pokémon Red: 40% encounter rate
** Pokémon Blue: 40% encounter rate

### Route 24

In the tall grass
* 010 - Caterpie
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 011 - Metapod
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 013 - Weedle
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 014 - Kakuna
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 016 - Pidgey
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 063 - Abra
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate

### Route 25

In the tall grass
* 010 - Caterpie
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 20% encounter rate
* 011 - Metapod
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 20% encounter rate
* 013 - Weedle
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 1% encounter rate
* 014 - Kakuna
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 4% encounter rate
* 016 - Pidgey
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 043 - Oddish
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 063 - Abra
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 069 - Bellsprout
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate

### Diglett’s Cave

Anywhere
* 050 - Diglett
** Pokémon Red: 95% encounter rate
** Pokémon Blue: 95% encounter rate
* 051 - Dugtrio
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate

### Mt. Moon

First floor (anywhere)
* 035 - Clefairy
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
* 041 - Zubat
** Pokémon Red: 79% encounter rate
** Pokémon Blue: 79% encounter rate
* 046 - Paras
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 074 - Geodude
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
Connecting tunnels (anywhere)
* 035 - Clefairy
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate
* 041 - Zubat
** Pokémon Red: 60% encounter rate
** Pokémon Blue: 60% encounter rate
* 046 - Paras
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 074 - Geodude
** Pokémon Red: 26% encounter rate
** Pokémon Blue: 26% encounter rate
Deepest floor (anywhere)
* 035 - Clefairy
** Pokémon Red: 6% encounter rate
** Pokémon Blue: 6% encounter rate
* 041 - Zubat
** Pokémon Red: 54% encounter rate
** Pokémon Blue: 54% encounter rate
* 046 - Paras
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 074 - Geodude
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Pokémon Tower

Third floor (anywhere)
* 092 - Gastly
** Pokémon Red: 90% encounter rate
** Pokémon Blue: 90% encounter rate
* 093 - Haunter
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
* 104 - Cubone
** Pokémon Red: 9% encounter rate
** Pokémon Blue: 9% encounter rate
Fourth floor (anywhere)
* 092 - Gastly
** Pokémon Red: 86% encounter rate
** Pokémon Blue: 86% encounter rate
* 093 - Haunter
** Pokémon Red: 9% encounter rate
** Pokémon Blue: 9% encounter rate
* 104 - Cubone
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
Fifth floor (anywhere)
* 092 - Gastly
** Pokémon Red: 86% encounter rate
** Pokémon Blue: 86% encounter rate
* 093 - Haunter
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 104 - Cubone
** Pokémon Red: 9% encounter rate
** Pokémon Blue: 9% encounter rate
Sixth floor (anywhere)
* 092 - Gastly
** Pokémon Red: 85% encounter rate
** Pokémon Blue: 85% encounter rate
* 093 - Haunter
** Pokémon Red: 6% encounter rate
** Pokémon Blue: 6% encounter rate
* 104 - Cubone
** Pokémon Red: 9% encounter rate
** Pokémon Blue: 9% encounter rate
Seventh floor (anywhere)
* 092 - Gastly
** Pokémon Red: 75% encounter rate
** Pokémon Blue: 75% encounter rate
* 093 - Haunter
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 104 - Cubone
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate

### Rock Tunnel

Upper floor (anywhere)
* 041 - Zubat
** Pokémon Red: 55% encounter rate
** Pokémon Blue 55% encounter rate
* 066 - Machop
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 074 - Geodude
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 095 - Onix
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
Lower floor (anywhere)
* 041 - Zubat
** Pokémon Red: 50% encounter rate
** Pokémon Blue 50% encounter rate
* 066 - Machop
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 074 - Geodude
** Pokémon Red: 26% encounter rate
** Pokémon Blue: 26% encounter rate
* 095 - Onix
** Pokémon Red: 9% encounter rate
** Pokémon Blue: 9% encounter rate

### Safari Zone – Entrance

In the tall grass
* 029 - Nidoran ♀
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 10% encounter rate
* 030 - Nidorina
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 029 - Nidoran ♂︎
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 033 - Nidorino
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 102 - Exeggcute
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 047 - Parasect
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 047 - Venonat
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 111 - Rhyhorn
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 113 - Chansey
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
* 123 - Scyther
** Pokémon Red: 4% encounter rate
** Pokémon Blue: Does not appear
Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Super Rod
* 089 - Krabby
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 054 - Psyduck
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 079 - Slowpoke
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 147 - Dratini
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate

### Safari Zone – East Area

In the tall grass
* 029 - Nidoran ♀
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 25% encounter rate
* 030 - Nidorina
** Pokémon Red: Does not appear
** Pokémon Blue: 10% encounter rate
* 032 - Nidoran ♂
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 033 - Nidorino
** Pokémon Red: 10% encounter rate
** Pokémon Blue: Does not appear
* 046 - Paras
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 084 - Doduo
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 102 - Exeggcute
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 115 - Kangaskhan
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate
* 123 - Scyther
** Pokémon Red: 1% encounter rate
** Pokémon Blue: Does not appear
* 127 - Pinsir
** Pokémon Red: Does not appear
** Pokémon Blue: 1% encounter rate

### Safari Zone – North Area

In the tall grass
* 029 - Nidoran ♀
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 030 - Nidorina
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 10% encounter rate
* 032 - Nidoran ♂
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 033 - Nidorino
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 5% encounter rate
* 046 - Paras
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 049 - Venomoth
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 102 - Exeggcute
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 111 - Rhyhorn
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 113 - Chansey
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate
* 128 - Tauros
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate

### Safari Zone – West Area

In the tall grass
* 029 - Nidoran ♀
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 25% encounter rate
* 030 - Nidorina
** Pokémon Red: Does not appear
** Pokémon Blue: 10% encounter rate
* 032 - Nidoran ♂
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 033 - Nidorino
** Pokémon Red: 10% encounter rate
** Pokémon Blue: Does not appear
* 102 - Exeggcute
** Pokémon Red: 20% encounter rate
** Pokémon Blue: 20% encounter rate
* 084 - Doduo
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 048 - Venonat
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 115 - Kangaskhan
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
* 128 - Tauros
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate

### Seafoam Island

Ground floor (anywhere)
* 041 - Zubat
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 042 - Golbat
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 054 - Psyduck
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 15% encounter rate
* 055 - Golduck
** Pokémon Red: 1% encounter rate
** Pokémon Blue: Does not appear
* 079 - Slowpoke
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 5% encounter rate
* 086 - Seel
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 090 - Shellder
** Pokémon Red: 19% encounter rate
** Pokémon Blue: Does not appear
* 098 - Krabby
** Pokémon Red: Does not appear
** Pokémon Blue: 20% encounter rate
* 116 - Horsea
** Pokémon Red: 20% encounter rate
** Pokémon Blue: Does not appear
* 120 - Staryu
** Pokémon Red: Does not appear
** Pokémon Blue: 19% encounter rate
Basement 1 (anywhere)
* 054 - Psyduck
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 079 - Slowpoke
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 086 - Seel
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 087 - Dewgong
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate
* 090 - Shellder
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 15% encounter rate
* 098 - Krabby
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 099 - Kingler
** Pokémon Red: Does not appear
** Pokémon Blue: 1% encounter rate
* 116 - Horsea
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 117 - Seadra
** Pokémon Red: 1% encounter rate
** Pokémon Blue: Does not appear
* 120 - Staryu
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 25% encounter rate
Basement 2 (anywhere)
* 042 - Golbat
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate
* 054 - Psyduck
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate
* 055 - Golduck
** Pokémon Red: Does not appear
** Pokémon Blue: 1% encounter rate
* 079 - Slowpoke
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 080 - Slowbro
** Pokémon Red: 1% encounter rate
** Pokémon Blue: Does not appear
* 086 - Seel
** Pokémon Red: 40% encounter rate
** Pokémon Blue: 40% encounter rate
* 090 - Shellder
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 10% encounter rate
* 098 - Krabby
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 116 - Horsea
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 120 - Staryu
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 5% encounter rate
Basement 3 (anywhere)
* 054 - Psyduck
** Pokémon Red: Does not appear
** Pokémon Blue: 40% encounter rate
* 079 - Slowpoke
** Pokémon Red: 40% encounter rate
** Pokémon Blue: Does not appear
* 086 - Seel
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 087 - Dewgong
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
* 090 - Shellder
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 098 - Krabby
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 099 - Kingler
** Pokémon Red: Does not appear
** Pokémon Blue: 4% encounter rate
* 116 - Horsea
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 117 - Seadra
** Pokémon Red: 4$ encounter rate
** Pokémon Blue: Does not appear
* 120 - Staryu
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
Basement 4 (anywhere)
* 042 - Golbat
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
* 054 - Psyduck
** Pokémon Red: Does not appear
** Pokémon Blue: 15% encounter rate
* 055 - Golduck
** Pokémon Red: Does not appear
** Pokémon Blue: 4% encounter rate
* 079 - Slowpoke
** Pokémon Red: 15% encounter rate
** Pokémon Blue: Does not appear
* 080 - Slowbro
** Pokémon Red: 4% encounter rate
** Pokémon Blue: Does not appear
* 086 - Seel
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 090 - Shellder
** Pokémon Red: 25% encounter rate
** Pokémon Blue: Does not appear
* 098 - Krabby
** Pokémon Red: Does not appear
** Pokémon Blue: 40% encounter rate
* 116 - Horsea
** Pokémon Red: 40% encounter rate
** Pokémon Blue: Does not appear
* 120 - Staryu
** Pokémon Red: Does not appear
** Pokémon Blue: 25% encounter rate

### Unknown Dungeon

First floor (anywhere)
* 024 - Arbok
** Pokémon Red: 10% encounter rate
** Pokémon Blue: Does not appear
* 026 - Raichu
** Pokémon Red: 4% encounter rate
** Pokémon Blue: 4% encounter rate
* 028 - Sandshrew
** Pokémon Red: Does not appear
** Pokémon Blue: 10% encounter rate
* 042 - Golbat
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 047 - Parasect
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 049 - Venomoth
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 064 - Kadabra
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 5% encounter rate
* 082 - Magniton
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 085 - Dodrio
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 097 - Hypno
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 132 - Ditto
** Pokémon Red: 1% encounter rate
** Pokémon Blue: 1% encounter rate
Second floor (anywhere)
* 040 - Wigglytuff
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 049 - Venomoth
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 064 - Kadabra
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 085 - Dodrio
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 105 - Marowak
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 112 - Rhydon
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 113 - Chansey
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
* 132 - Ditto
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate
Basement (anywhere)
* 024 - Arbok
** Pokémon Red: 5% encounter rate
** Pokémon Blue: Does not appear
* 026 - Raichu
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 028 - Sandslash
** Pokémon Red: Does not appear
** Pokémon Blue: 5% encounter rate
* 047 - Parasect
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 101 - Electrode
** Pokémon Red: 15% encounter rate
** Pokémon Blue: 15% encounter rate
* 106 - Marowak
** Pokémon Red: 15% encounter rate
** Pokémon Blue 15% encounter rate
* 112 - Rhydon
** Pokémon Red: 25% encounter rate
** Pokémon Blue: 25% encounter rate
* 113 - Chansey
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate
* 132 - Ditto
** Pokémon Red: 10% encounter rate
** Pokémon Blue: 10% encounter rate

### Viridian City

Fishing with the Old Rod
* 129 - Magikarp
** Pokémon Red: 100% encounter rate
** Pokémon Blue: 100% encounter rate
Fishing with the Super Rod
* 060 - Poliwag
** Pokémon Red: 50% encounter rate
** Pokémon Blue: 50% encounter rate
* 072 - Tentacool
** Pokémon Red: 50% encounter rate

### Viridian Forest

In the tall grass
* 010 - Caterpie
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 50% encounter rate
* 011 - Metapod
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 35% encounter rate
* 013 - Weedle
** Pokémon Red: 50% encounter rate
** Pokémon Blue: 5% encounter rate
* 014 - Kakuna
** Pokémon Red: 35% encounter rate
** Pokémon Blue: 5% encounter rate
* 025 - Pikachu
** Pokémon Red: 5% encounter rate
** Pokémon Blue: 5% encounter rate

## References

The statistics in this page were compiled from the StrategyWiki version of this guide.