Sea Route 20

Pokemon Red and Blue

PokemonLevelsMethodRarity
118Goldeen10Fishing with a Good Rod50%
118Goldeen15Fishing with a Super Rod25%
116Horsea15Fishing with a Super Rod25%
129Magikarp5Fishing with an Old Rod100%
060Poliwag10Fishing with a Good Rod50%
090Shellder15Fishing with a Super Rod25%
120Staryu15Fishing with a Super Rod25%
072Tentacool5-40Surfing100%

Pokemon Yellow

PokemonLevelsMethodRarity
118Goldeen10Fishing with a Good Rod50%
129Magikarp5Fishing with an Old Rod100%
060Poliwag10Fishing with a Good Rod50%
120Staryu30Fishing with a Super Rod20%
072Tentacool5-40Surfing100%
072Tentacool20Fishing with a Super Rod40%
073Tentacruel20-40Fishing with a Super Rod40%

Pokemon HeartGold and SoulSilver

PokemonLevelsMethodRarity
170Chinchou20Fishing with a Good Rod20%
170Chinchou40Fishing with a Super Rod40%
171Lanturn40Fishing with a Super Rod10%
129Magikarp10Fishing with an Old Rod85%
129Magikarp20Fishing with a Good Rod40%
090Shellder20Fishing with a Good Rod10%
090Shellder40Fishing with a Super Rod30%
072Tentacool10Fishing with an Old Rod15%
072Tentacool20Fishing with a Good Rod30%
072Tentacool30-35Surfing90%
073Tentacruel40Fishing with a Super Rod20%
073Tentacruel35Surfing10%