Midday Constellation

• 1). Walk to the Duel Academy shop.
  
  
• 2). Walk to the booster screen, and press "triangle" to access it.
  
  
• 3). Enter the following button combination in this order: "up," "up," "down," "down," 'left," "right," "left," "right," "x," "o." This gets you the Midday Constellation (or Noon Star) booster.
  
  

Card Unlocks

• 1). Go inside the Duel Academy laboratory.
  
  
• 2). Walk to the password machine, and press "triangle" to access it.
  
  
• 3). Enter the eight-digit numerical code that corresponds to the card you want to unlock, to make it available in the rental shop.