what do you want to know about the shovel in spirit tracks? be more specific with your question.
There is no shovel in Spirit Tracks. However, the Song of Discovery can be played on the Spirit Flute to call stuff up from underground. You learn it in Anouki Village. Also, the Sand Wand you get in the Sand Temple is basically the same thing as a shovel, since sometimes when you raise the sand, you'll find Rupees and keys and stuff.