You dropped a damsel into the pool in the Eternal Paradise stage.

You cleared Stage 2 in Fight Lab.

You cleared an Offline Mode arcade battle with a partner.

Your upper body got wet in the Fallen Garden stage.

You broke a floor.

Collect all of the house crests in Year 1

Collect all of the Red Bricks

Complete the Story Levels in all four years

Turn the sound and music down to 0 in the options menu whilst in the library

Use the Time-Turner

Complete Year Two Story Levels

Defeat 20 enemies with Fang