Originally Posted by Shino'sDad
Seeing as the intention of the card is to find a Ninja you want and pick it, if you can look through their whole deck and remember what's in there in under maybe 20 seconds, then that'd be fine. Any more and I as a judge would probably consider it stalling.
^This. Then if you've got a good memory, once it's your opponent's turn, write down everything you can! ;P