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One Island

Access to:
East: Kindle Road
South: Treasure Beach
Accessible from the city (via the Seagallop Ferries): Vermilion City, Two Island, Three Isle Port, Four Island, Five Island, Six Island, and Seven Island

Places of interest:
Pokémon Network Center: After restoring the Network Machine by delivering the Ruby and Sapphire, the player can use this Pokémon Center to connect to Ruby, Sapphire, Emerald, Colosseum, and XD.

Utility:
Surf is required to travel to Treasure Beach in the south. Wild Pokémon can also be encountered here with Surf.

Choose display option for Pokémon tables:

Pokémon

  • Wild Shellder have a 50% chance of holding a Pearl and a 5% chance of holding a Big Pearl.
  • Wild Staryu have a 50% chance of holding Stardust and a 5% chance of holding a Star Piece.

Surfing

Combined (Compressed)
Pokémon FireRed LeafGreen
Tentacool
Tentacool 95% lv. 5-40 95% lv. 5-40
Tentacruel
Tentacruel 5% lv. 35-40 5% lv. 35-40

Fishing

Combined (Compressed)
Rod Pokémon FireRed LeafGreen
Old
Magikarp
Magikarp 100% lv. 5 100% lv. 5
Good
Magikarp
Magikarp 20% lv. 5-15 20% lv. 5-15
Good
Horsea
Horsea 80% lv. 5-15 N/A
Good
Krabby
Krabby N/A 80% lv. 5-15
Super
Gyarados
Gyarados 15% lv. 15-25 15% lv. 15-25
Super
Horsea
Horsea 40% lv. 15-25 N/A
Super
Shellder
Shellder 40% lv. 15-25 N/A
Super
Seadra
Seadra 4% lv. 25-35 N/A
Super
Psyduck
Psyduck 1% lv. 25-35 N/A
Super
Krabby
Krabby N/A 40% lv. 15-25
Super
Staryu
Staryu N/A 40% lv. 15-25
Super
Kingler
Kingler N/A 4% lv. 25-35
Super
Slowpoke
Slowpoke N/A 1% lv. 25-35

Items

FireRed and LeafGreen Items
Item Games Location Notes
Meteorite FR LG Obtained from Bill the first time the player visits the area
Tri-Pass FR LG Obtained from Celio the first time the player visits the area The Tri-Pass allows the player to visit Two and Three Islands.
Town Map FR LG Obtained from Celio the first time the player visits the area Only if the player did not receive it from Daisy in Pallet Town.
Rainbow Pass FR LG Obtained from Celio in exchange for the Ruby The Rainbow Pass allows the player to visit Four, Five, Six, and Seven Islands.