Fossil Fighters - Nintendo DS Find and fight! Collect over 100 different vivosaurs and pit them against enemy vivosaurs in strategic, turn-based battles. Your skills enhance your vivosaurs' powers. Each fossil must be carefully cleaned of excess rock. With a steady hand and keen eye, you can make your vivosaurs stronger Battle and trade with friends. Using DS Wireless Play, you can take on a friend within range of your system for head-to-head battles or trade your extra fossils for new ones