One of the trickier Combo Cards to locate in Dead Rising 2 is the Burning Skull Combo Card. The location of the Burning Skull Combo Card is in fact one of the hidden ones.
To obtain the card you will first need quite a large stash of money (approximately 1 million). Once you’ve amassed the cash head to the Silver Strip area and go to One Little Duck Bingo. Outside you’ll see a fortune teller machine (which is also an awesome reference to the Zoltan Fortune Teller Machine from the movie Big!). Keep inserting money until EVENTUALLY, the Fortune Teller Machine will spit out the Burning Skull Combo Card.
Now celebrate acquiring the Burning Skull Combo Card by taking the nearby bike for a spin over the surrounding zombies