Big Pearl

A quite-large pearl that sparkles in a pretty silver color. It can be sold at a high price.

FireRed

Five Island (hidden)

Hidden

Resort GorgeousLady Selphy

Random reward

Gift

Rocket WarehouseMain

Ground

Route 20Seafoam IslandsB2F

Ground

Treasure Beach

Hidden

LeafGreen

Five Island (hidden)

Hidden

Resort GorgeousLady Selphy

Random reward

Gift

Rocket WarehouseMain

Ground

Route 20Seafoam IslandsB2F

Ground

Treasure Beach

Hidden

Emerald

Route 105

Hidden

Route 121Safari ZoneSoutheast

Ground

Route 125

Ground

Route 125Shoal CaveEntrance Low

Ground

Route 133

Ground

Route 124Underwater

Hidden

Route 126Underwater

Hidden