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 - Jiggly puff 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 Cerulean Cave 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 - Magneton 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.