Booster Packs Unlocked
1. First Monster: Available at start
2. First Spell-Trap: Available at start
3. First Fusion: Play after May 7th
4. First Effect Monsters: Available at start
5. Step Up Spell-Trap: Available at start
6. Step Up Fusion: Play after May 7th
7. Anti Effect: Pack 4, 5, 6 has at least 80% collected
8. Life Breaker: Pack 4, 5, 6 has at least 80% collected
9. Go Go Direct: Pack 4, 5, 6 has at least 80% collected
10. Visitor From The Dark: First stage Monday
11. Emergent Fire: First stage Tuesday
12. Water Of Life: First stage Wednesday
13. Gift Of Wind: First stage Thursday
14. Platinum Light: First stage Friday
15. Earth Dwellers: First stage Saturday
16. Lucky Economy Pack: First stage Sunday
17. Endless Thoughts: Player over level 5
18. Flip The Picture: Player over level 10
19. Equip Me: Player over level 15
20. More Eternal Memories: Player over level 20
21. Speed King: Player over level 25
22. Spice of Duel: Player over level 30
23. Fairy's Sky: Player over level 35
24. Dragon Drive: Player over level 40
25. Fiend Night: Player over level 45
26. Skillful Spellcasters: At least five characters cleared all three stages
27. Cold Skin: 50% collected at the Duel Ranking
28. Ritual Dance: Player play time more than 20 hours
29. Symbol 50: Player over level 50
30. Wave Of The Future: Ten consecutive wins
31. Good Ol' Days: Ten consecutive losses
32. Hero Emerges!: Have the best relation with Yuki Judai
33. A Machines Soul Never Sleeps: Have the best relation with Sho Marufuji
34. Beast Kingdom: Have the best relation with Hayato Maeda
35. Maidens Heartbeat: Have the best relation with Tenjoin Asuka
36. Never Give Up: Have the best relation with Manjoume Jun
37. Warriors Pyramid: Have the best relation with Daichi Misawa
38. Technology Master: Have the best relation with Ryo Marufuji
39. Bit Players: Use the characters in page two to finish stages 2 and 3
40. Vanilla Gloom: Using the characters in page three to finish stages 2 and 3
41. Tag Survivor: Enter stage 2
42. Princeton Power: Clear stages 2 and 3 with the Manjoume Brothers (No. 5, 28, 29)
43. Approach the Hotties: Clear stages 2 and 3 with Mindy (No. 20)
44. Dorothy's Soul: Clear stages 2 and 3 with Dorothy (No. 027)
45. Sadie's Soul: Clear stages 2 and 3 with Sadie (No. 026)
46. Midday Constellation (Noon Star): Enable cheat code (see above)
47. Double Triple Destiny Draw: Buy the Golden Egg
48. Checkered Flag: Have over 90% cards collected

Booster Pack
At the card shop interface, press:
Up(2), Down(2), Left, Right, Left, Right, X, Circle

Easy DP
Go to Free Duel mode and use a deck that uses as many cards that reduce your opponents as possible. Set the rules so that you and your opponent's LP are 2,000. Now, play them all from your hand for an easy win. Do this against an Obelisk Blue Girl for a large bonus. Use Tremendous Fire, Restructor Revolution, Ookazi, Final Flame, Hinotama, and even Sparks to achieve this.

Booster pack
Press Up(2), Down(2), Left, Right, Left, Right, X, Circle

Pharaoh the Cat boosts Your Charisma
Description: Lyman Banner, the head of the Slifer Red Dorms, has a cat named Pharoah that appears in the game. If you go up to him and talk, you will get three options:

Pet its head
Pet its throat
Pet its back

Pick one option and if Pharaoh likes it, Pharaoh will start following you around the school for the rest of the day (until you go to sleep). If you pet Pharoah and he doesn't like being touched there, you can always feed it a sandwich instead and he will start following. He especially likes the fish sandwiches, like Dried Mackerel. The advantage of having Pharaoh follow you around is that when you talk to main characters like Jaden, Chumley or Zane, they notice Pharaoh and then no matter what option you choose in your conversation with the character you will have a GREAT talk and increase your likability with the character. This is great for building relationships with characters quick, however Pharoah is not always in plain sight. Pharaoh may be found at the bottom of the stairs when you leave your room in the Red Slifer Dorms, in the kitchen of the Red Slifer Dorms, or on the side of the Ra Yellow Dorms.

One more thing, you can only do this once per day.