Sorry, this tab no longer has the underground part because the underground part that I had tabbed in here was false, so I replaced it with the Sea Theme, which flows directly after the Land Theme. Enjoy!

Super Mario Theme - Land/Sea (tabbed from music from the original score)

  Intro
G|-----------------12--0|
D|--0-0-0--0--0-0-------|
A|----------------------|
E|----------------------|

G|--0--------------------5-9-10--7-9--5--2-4-0|
D|-----2-----3--5-4-3--2----------------------|
A|--------3-----------------------------------| x2
E|--------------------------------------------|
                                                                                     ___________
                   (these are 22's vv vv vv, not 2's close together)                 |2nd ending
G|-----0--5----5-5-5----------0-5--22-22-22-0----0--5----5-5-5------1--3--5--0-0-----|--0-0--|
D|----------3--------3-----2--------------------------3--------3---------------------|-------|
A|--3-------------------3---------------------3------------------3---------------3--3|------3| x2
E|-----------------------------------------------------------------------------------|-------|
                    x2
G|--------------------|-----------------------------12-----------------------------|
D|--------6-5---------|--------6-5-------0-0-0--0-0--------------------------------|
A|-----6-------3------|-----6-------3----------------------------------------------|
E|--4-------------3--4|--4-------------3---------------3-3-3--3--3-3-3--3--3-3-3--3|
                                                       |-ritardando--------------| 
End of Land theme

Sea theme coming soon, I'm tired... I have the music, I just don't want to tab it right away. Have fun with the land theme. If you don't believe that it really is the land theme, go listen to the song on the game and listen hard for the bass part, I guarantee you this is it and it's 100% correct.
-