Thats from when they were going to let you play with him in the fighting game regardless of his age and progression through Konquest.

I still believe that is one of his "super unlockable" alternate costumes. When you unlock his alternate in the game, as we all know, it says "Shujinko's Alternate costume 1". That has to be proof that there are hidden secrets not known yet.

ive seen another costume for shujinko in an online article about martial arts and video games.. the picture had shujinko wearing a third outfit. also, when you unlock shujinkos alternate in the krypt it says "shujinkos alternate costume 1" hence maybe there is a number 2? oops, maybe i should read posts before responding...