Takes around 5-10 minutes from first starting the game.
1. Complete the first level, A Big Adventure.
2. Use the blue orb you received at the end of the first level (unmissable) to open the bridge to the second area.
3. Cross the bridge and go inside Zom Zom's tent.
4. Select Browse Stock.
5. Purchase one of the four costumes priced at 350 bells. You have 350 bells automatically, they do not need to be earned in the first level.
The trophy will unlock.