It is explored in Golden Sun: The Lost Age. If you have the Sand Psynergy found in Gaia Rock and the Red Handkerchief found in Southeast Angara Islet, you can get to a cow and give it the handkerchief so that it will give you the Milk, which you can then use in West Indra Islet. There is also a Lucky Medal hidden in a box inside the house.
N Osenia Islet is home to three generations of sailors, all of whom wish to cross the nearby Sea of Time, all of whom have failed. While they drop hints about how to safely cross the currents, it is the master navigator, Yepp, of Yallam, who is much more helpful, as his song is actually a map of the waters.
|Bestiary of N Osenia Islet|
|Monster Name||LVL||HP||ATK||DEF||AGI||EXP||Coins||Weakness||Drop||Drop Rate|
|Alec Goblin||22||147||190||48||91||126||146||Smoke Bomb||1/32|
|Death Cap||22||117||159||19||90||48||56||Sleep Bomb||1/32|
|Dire Wolf||22||155||186||44||101||118||114||Weasel's Claw||1/32|
|Ghost Mage||22||161||168||43||86||80||110||Bramble Seed||1/16|
|Numb Ant||22||101||172||57||91||111||111||Bramble Seed||1/32|
|Minor Locations in Golden Sun|
|Alpine Crossing • Bilibin Barricade • Gondowan Passage • Fuchin Temple • Kalay Docks • Kolima Bridge • Lama Temple • Tolbi Docks|
|Minor Locations in Golden Sun: The Lost Age|
|Ancient Lemuria • Atteka Inlet • E Tundaria Islet • East Indra Shore • Gondowan Settlement • Hesperia Settlement • Idejima • N Osenia Islet • Osenia Cliffs • SE Angara Islet • Sea of Time Islet • SW Atteka Islet • West Indra Islet|