Mr Wise-Guy Trophy in The Inner World
Complete the game without taking hints from the help system. In other words: don’t press L2.
How to unlock Mr Wise-Guy
Self-explanatory. Never press . Pressing once brings up the option to unlock hints, while pressing afterwards actually unlocks the hint. I'm not certain if just bringing up the option will negate the trophy so it's best to just avoid the button entirely.
Whenever you're playing the nose flute, you have the option to press to play a note but that's fine and should be the only time you use the button.