At the Sound Options highlight Mono then hold X and press Right Up Right Up L1 R2 L1 R2.
Select the End command and highlight the first option. Then hold X press Right4x L1 Up Start Right.
At the Title screen hold R1 and begin playing a minigame. After completing the minigame at the Summary screen hold X Triangle.
When the SD character begins moving while the game loads hold X and press Right Up Left Up Right Down Left Up Triangle.