Nintendogs: "This collar features a special stone that brings good luck."
Nintendogs + Cats: "This leather collar is studded with pieces of real turquoise."
How to Obtain[]
In Nintendogs, the Lucky Collar can be found uncommonly on walks and sells for $10.00 at the Secondhand Shop.
In Nintendogs + Cats, the Southwest Collar can be purchased at Coletta after reaching 7,800 Owner Points or playing for 26 days. It can also be obtained from the Pedometer after 10,000-99,998 steps. It sells for $24 at the Secondhand Shop.
If one's dog is wearing the Lucky Collar, and one's clock is set as the Clover Clock, there is a greater chance of finding items (and therefore rare items) while on a walk.