If you would like to play your duel at a faster pace than normal than, hold the L and R buttons down and keep them held down during the paper, rock, scissors game and while decided who will play first. Once the duel starts you can let go. The game will now be twice as fast as normal.
Unlock Simon
To unlock Simon, win the annual tournament in November.
Unlock Characters
-To unlock stage 2, beat stage 1 characters 2 times each
-To unlock stage 3, beat stage 2 characters 3 times each
-To unlock stage 4, beat stage 3 characters 4 times each
-To unlock stage 5, beat stage 4 characters 5 times each
-To unlock Grandpa beat Simon once
-To get Maxamillion P. just get toon world (the card)
Targeting
When card effects such as those of Man-Eater Bug (destroy 1 monster) and Hane-Hane (return up to 2 of your opponents monsters to his/her hand) your opponent will always target the monster with the highest defense, so attack with that monster.
New booster packs
When you beat a stage 10 times, you will get a new booster pack.
Egyptian God-cards
The Winged Dragon of Ra can be found in Yu-Gi-Oh! Magazine (check the calendar). Obelisk the Tormentor can be found in the green Millenium-puzzel booster pack. You can get that booster pack by beating stage 4 10 times. If you are using an emulator, save before choosing a booster pack. If there isn't a useful card in it, load again. (for the VisualBoy Advance use the F keys)
Get every card
Beat Simon 1 time in the 5th group of duelists,but you must unlock him by doing the Grampa tournoment and beat Trusdale.
Monster Combo
Panther Warrior and Sinister Serpent. If you have these cards on the field, you can attack with Panther Warrior and offer Sinister Serpent as a Tribute and it keeps coming back to your hand so you can keep on Tribute it. NOTE: You will not be able to summon other monsters.
Ultimate Offering
Ultimate offering is a fantastic card when you have a deck full of level 5-6 monsters. You can use it to inflict a great amount of damage to your opponent. This is how it works: have 1 to 3 monsters on the field. If you duel right, your opponent should have 1 or 2 monsters in face-down defense position on the field. first, during your battle phase, destroy the opponents monsters as far as possible. Watch out for Effect monster cards and trap/magic cards. Always attack with the monster with the highest defense so that effect monster cards will target that monster. If you can't attack anymore, don't end your battle phase but use Ultimate Offering (you do have to have enough LP left, never use thi when you are around 2000) it doesn't matter that the monsters on the field are stronger than the monsters in your hand, but do summon weaker monsters when you're planning this. Summon as many monsters as possible and attack the opponents LP. if there are more monsters in your hand, keep going. That way you can keep summoning monsters for a low price (that's my opinion) and get the opponents LP way down.
Egyptian God-cards (addition)
Slifer the Sky Dragon can be found in the golden Millenium Puzzle booster pack.
Tribute to the Doomed trick
If you don't have any cards in your hand to discard, Tribute to the Doomed will still work. A good combo is Monster Reborn+Tribute to the Doomed. Discard 1 strong monster card from yor hand, destroy 1 monster and return the discarded monster (or the destroyed monster, if you don't have strong monster cards in your hand) with Monster Reborn.
New booster packs (addition)
If you defeat everyone untill Kaiba 20 times you get Gemini elf booster pack, Blue-Eyes White Dragon booster pack, Exodia booster pack, Launcher Spider booster pack, Battle Ox booster pack, Blue-Eyes Toon Dragon booster pack and Millenium Eye (sort of) booster pack.
PS: The Tribute to the Doomed trick will only work if you have the card in your hand, not on the field.
Beat kaiba easy
To easily beat kaiba just have a dragon capture jar or 2 in your deck.kaiba's deck is 55% dragon,just use dragon capture jar and all you have to worry about is vorse raider.
Note:dragon capture jar really comes in handy against Blue eyes ultimate dragon.
1 turn victory
This rarely happens but when it does it is sweet!
There are actually 2 ways. the harder way is to go first and draw exodia in your hand but obviously the chances are like finding a needle in a haystack.the easier way is to go second,let him play magic,trap,monster,whatever he wants,it won't do him any good.when it is your turn draw heavy storm,raigeki,cyber stein and megamorph,plus have a blue eyes ultimate dragon in your fusion pile.
(can get in blue eys ultimate dragon pack)use the heavy storm to get rid of the magic/trap cards,use raigeki to get rid of the monster(s),then play cyber stein and activate the effect then choose blue eyes ultimate and use megamorph so b.e.u.d. has 9000 attack!!!attack his lifepoints directly and you win!