One Island...This Island is the first, and yet one of the Biggest islands. There are few bits to mention here but here we go:

The First Thing of Note is that the Pokémon Center is quite larger as it contains a Giant Machine that allows you to trade with Ruby, Sapphire & Colosseum. But you need to power it with the Ruby and Sapphire Plates
There are trainers in the waters and hiding in the Grass aswell as Wild Pokémon Such as Fearow
On your path North through the Island are some Hot Springs which allow you to heal your Pokémon after the Many Battles on the way up and also contains a Man who will give you HM06
Also, High Up on this Island in a cave quite far to the north is a Level 50 Moltres. Moved from Victory Road and Now Here. But you can only get to it as soon as you rid the Islands of the Bike Gangs
After Beating the Elite 4, behind where 2 Rockets were, A Cave Opens. This cave hosts Wild Slugma and also has a Braille message but it after that it holds the Ruby Plate

Location Map of One Island

Hover to get area

Mt. Ember Kindle Road One Island Treasure Beach

Wild Pokémon on One Island

Here are the Pokémon you will find in the wild on One Island :

In The Grass
Geodude Common
Common
Spearow Common
Common
Fearow Rare
Rare
Persian Rare
Rare
Ponyta Common
Common
Rapidash Rare
Rare
Tangela Rare
Rare
Psyduck Uncommon
Golduck Rare
Slowpoke
Rare
Slowbro
Rare
Magmar
Rare
In The Water
Tentacool Common
Common
Tentacruel Rare
Rare
Horsea Rare
Rare
Gyarados Rare
Rare
In The Cave
Machop Common
Common
Machoke Rare
Rare
Geodude Common
Common
Graveler Rare
Rare
Slugma Common
Common

Thats all on Island 1...Click Here for Two Island

 
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