The Green Hat is an item in Nintendogs and Nintendogs + Cats. It is only available in Nintendogs if the player's dog finds it when taking walks. The green "L" stands for Luigi, a classic character in most Nintendo games. Its counterpart, the Red Hat, belongs to Luigi's brother, Mario. This hat is found under Accessories in your supplies and can be worn by any kind of dog. At the Secondhand Shop, this product sells for $20. In Nintendogs + Cats, It was only viewable through the AR Camera. One comes with the second US distribution of Honest Abe via SpotPass DLC, but it is renamed "Luigi's Hat", and cannot be sold in the Secondhand Shop, or be set as a StreetPass present.
DS: "This hat is standard gear for mustachioed apprentice plumbers."
3DS: "This hat is standard gear for mustachioed younger bros."