what are the best coins

i need to beat sinra at sperebreak what are the best coins to beat him after the tourament

i would, i really would, but i have no clue.i skipped that i am afraid.-.-;;.

dig around in the central expanse in bikanel desert and you can get coins with the ability QUOTAx5 like omega weapon and such

they are on lvl 7 so there are probably beter coins but i havent found em

If you go to GameFAQ's by clicking here and select FFX-2 there is a coin FAQ there which can help!