Once you finish stage 3, you'll unlock the ability to complete missions as well as Daily Missions. To access it, press L1 to go to the missions hub and press Triangle. You should see a list of three daily missions (you can complete daily missions up to two days in advance). They're usually simple tasks, such as "Change your Hat" or "Clear an Avatar stage" and if you do so, you'll unlock an experience multiplier for a brief period of time. Complete all three missions you can access that day to unlock the trophy. Come back in the future and continue solving missions to unlock the following two trophies: