Win the race (I don't know the conditions)

Defeat Shinryu, and it drops WoD, one for kill, two for overkill, 25% chance of the drop being Dark Matter
Bribe Marlboro for 540,000 for 3-5 (4)
Bribe Greater Marlboro for 1,280,000 for 6-10 (8)

I don't know the values for Int/PAL bribes, because it's so useless (the game version, not the item)