For this every player needs to successfully complete a round so obviously having only 2 players will make this a lot easier.
From the main menu select 'Start a Party' and press
to continue as the settings are already correct there. Scroll down to where it says 'Random' and change it to Stunt as for the most part they are easier. (Make sure to leave it at only one round to unlock another trophy)
Start the game and providing both players complete the task this will be yours along with