Coverall Picture Bingo for 125

This might be a stupid question. How many different images would I need to create 125 unique picture bingo cards for a coverall game? I'm hoping to use one of the online bingo generator sites to create these cards. It would be the final game at a Christmas Bingo event and we'd like to have 1 winner (2-3 at the most.)
thanks

Should I be asking this differently? Ask the Wizard?