What do you suppose he hides under his mask?
I was playing Mario Power Tennis and after winning a tournament each character has a special cutscene where they recieve the trophy. Well for shy guy it shows him trip as he aproaches to recieve the trophy from Luigi and his mask comes off, they show him get up look at luigi and put his mask back on. All the while Luigi appears to be horrified by what he has seen!
What did he see!?
What do you think he saw?
In Mario Strikers Charged, when Shy Guy makes a goal, as he's happy he trips and his mask falls off, it shows a camera look at his face, but it doesn't show what it saw, then he puts his mask back on.
Plus, what's under the mask is whatever we want it to be, because we should never actually know, otherwise Shy Guy is ruined forever.
Just like a Jawa.
I KNOW I KNOW I KNOW!
Underneath that mask he wears upon his face, is the incredibly horrifying picture of....
(http://tbn2.google.com/images?q=tbn:5_Cq18mQw0RG8M:http://failurecasca.de/wp-content/uploads/awesome_med.png)
I can see why Luigi was scared.
http://www.nsfcd.com/forums/index.php?topic=29252.0;wap2
They will never show his face just tease at it. Sortof like master chief.