Ok so a lot of you know the pack cheat but then you run out and you still have to packs left in the store. Well you can easily avoid this:
1 go to store
2 enter the option where you buy packs (i forgot it)
3 enter any random pack by using A and select 1 pack then press B
4 enter a different pack and press L THEN deselect one of them
5 press B and go to a pack you havnt been to yet BUT DO NOT enter the pack
6 press R on that pack
7 you should notice that the total price has dropped to 150
8 press X

Now repeat these steps so you should end up having 1 pack left over. Just buy that last pack normally (150 DP). And now you can make a better deck :P

I have a staller deck recipe that I beat Kagemaru the first time every time.
Here goes:

Title: Do NOT ask why

Recipe: Amazoness Swords Woman X2
Big Shield Gardna X2
Black Stego X2
Blast Sphere X2
Bowganian X3
Command Knight X2
D.D. Warrior X3
Des Koala X1
Satellite Cannon X1
Spirit Reaper X1
Stealth Bird X3
Magical Mallet X3
Messanger of Peace X3
Spell Absorption X3
Wave-Motion CannonX3
Fairy Box X2
Gravity Bind X1
Magic Cylinder X1
Mirror Force X1
Nightmare Wheel X1(or 2)
Ring of Destruction X1(if possible)
Spellbinding Circle X2
Tower of Babel X2
Solemn WishesX2 (if possible)

Star_Meteor_Dragon

To do the school duel you need to be at level 20-21 and then it will be three diffrent people in there you and tow others from the school. You will then have the match against eachother, to get the match for the school duel you need to win at least 2 matches. In about a week time in the game time you will then have the maytch and you will be facing chazz as he comes back to the school.

If you want to get EXP faster just do this.
Beat Dr. Crowler 3times in a row. Then play easy people, I don't no how it happens but it dose, I've tried it and so has my two mates and it's worked all the time.

By sloaner

Some things to unlock:
Cheap Duel Disk:Get from linking withe nightmare troubadour
Pharao Disk:Beat Abidos until he gives to you
Vampire Disk:Beat Camula until she gives to you
Gorgeous Disk:Beat Admiral(appears on sub saturdays) until he gives
Alchemy Disk:Beat Banner until he gives
Amazonness Disk:Beat Tania until she gives
Kaibaman Disk:Beat Kaibaman(appear in hot springs at night in weekends)

Clothes:Collared Stuff Shirt:Link with nightmare troubadour
North academy uniform and Black Coat:Defeat Chazz until he gives
Yellow uniform:Beat Prof. Sartyr until he gives
Blue uniform:Beat Dark Zane until he gives
Titan coat:Beat Titan until he gives
Duel coat:Beat Prof. Crowler until he gives(note:if you use the titan or duel coat you don't need duel disk)
Suit:Beat Chumley until he gives
Academy jersey:Beat Fonda until she gives
Hawaiian Shirt:Beat Atticus until he gives
Kaibaman Coat:Beat Kaibaman until he gives

You can get the 3 egyptian gods by linking with nightmare troubadour(buy then in the shop for 4200dp,they are forbidden,only one per deck after game completion).

Some titles:Nightmare troubadour:obvious how to get
Study king:get 10 in a test
Academy Master:Reach lv26
Star of the academy:Complete the game
First class duelist:Beat Kagemaru

NOTE: The touch screen cannot be used with the glitch for some reason...

Step one: go to the shop

Step two: go to a pack:

Example: Legend of White Dragon, Powerful Seal. Whatever pack you want it does
not matter

Step Three: select one pack from the list of packs. Any one pack works.
Then exit the list by pressing B.

Step Four: move over to the pack you want to buy out.

Step Five: Enter the pack and press L then B, this highlights all packs and
exits the pack back to the list of packs

Step Six: Move to a pack that you haven't been to yet and press R.

End Result: You'll see the high number of DP disappear in the lower right
side of the touch screen and be replaced by "150". Just press X
twice to see all the packs you bought.

P.S.: if you don't want to waste time opening the packs just when they open press b

Hope it helps it has got me tons of rare and strong cards and saved thousands of DP

Koyutoro

Alchemy Disk Defeat Prof. Banner until he gives it to you.
Amazonness Disk Defeat Tania until she gives it to you.
Cheap Duel Disk Get from linking with Nightmare Troubadour
Gorgeous Disk Defeat Admiral until he gives it to you.
Kaibaman Disk Deafeat Kaibaman until he gives it to you.
Pharaoh Disk Defeat Abidos until he gives it to you.
Vampire Disk Defeat Camula until she gives it to you.

Okay I beat this game. By beating I founnd out some interesting stuff.
If you keep beating dark zane he will give you a oblesk blue uniform. He still hasn't register me as a duliest yet. I faced him 99 times. It wont go higher than that. If you want to know more just ask.

This glitch will put any amount of packs as 150 DP. Here's how to do it:
1. Go into whatever set, and checkmark 1 pack.

2. Select the set you want to buy all, or some of, and press L. Or checkmark them manually.

3. Exit out of that set, and highlight another set (Do NOT go into the other set) Now press R.

4. After doing all 3 above, Press X.

If done correctly, the packs you wanted, plus the one you checkmarked earlier, are only worth 150 DP altogether. This can be done with any pack.

Note: The set must not be empty in order for this to work.