This trophy is required to get the
You will have to win the Bronze Cup at each of the locations to progress the story but will need to win the Gold Cup in order to obtain 2 of the 9 Ryno cards in order to get the Master of war trophy. Winning gold isn't difficult. Biggest tips I can give you is to make use of the shortcuts (on Kalebo) and keep your boost meters filled by going over the big jumps when you can and doing tricks with
to keep refilling them.