CESA, short for Computer Entertainment Supplier’s Association, has been tracking illegal downloads of top selling handheld games. Out of all the titles – DS and PSP – Dissidia: Final Fantasy was downloaded the most.
According to their data, the PSP game was downloaded 5,281,223 times. CESA estimates a loss of 30,631,093,400 yen ($335 million) in sales. The dollar amount is questionable due to used game sales, price drops, and people who would never have purchased Dissidia anyway. In spite of those factors that number is still staggering.
[More PSP piracy figures at the link]