Smiley was Marshall's pet frog in "Pups Save a Flying Frog". Marshall entered him into the Frog-a-palooza Contest and won. He has not made any appearances since.
Smiley has all the characteristics of a normal everyday frog, except unlike other frogs, he somehow has the ability to operate Skye and Marshall's vehicles.
Smiley is a green frog with green eyes, and darker green spots on his skin. He has a lighter green underside.