there is no singal code, it is different on each card to stop people from doing exactly what you are tyring to do.
a 39 clues ultra rare card code is P247JJMMXP
The39clues
P24nxknmxp
The clue for the scoreboard card is cocoa and I'm an ekat too! Reply: Ha! Well you've been spied on because I'm a Lucian!
The flying lemur
There is a clue...... the clue is "TRUSTNOONE".
Boat sank in harbor (the letters are numbered like that i.e B=1, o=2 etc)
master pin code parental code for viewsat ultra it's not 0000
no one knows but if you need some card codes i have a few TRUSTNOONE MANINBLACK ARROW4HEAD LUCIANCODE p2xpdk9hxp THOSE ARE THE ONES I CAN ACTUALLY MEMORIZE :) THE CARD CODE IS HH3WK7CDHJF. that is actually the real card code. :)
at the beginning, the code is Lisbon
Sorry there is no code that gives you every clue in the 39 clues add me to your allies:P2749NM7XP
The code to unlock this clue is g5hj897z21