Yu-Gi-Oh! 7 Trials to Glory: World Championship Tournament 2005 Cheats

Sometimes on the scrolling bar on the top of the screen, it will say that mako is not feeling okay. If you talk to him equipped with an umi deck (a deck with umi and lots of water creatures) you can duel him in a sea battle. If you win he will give you a ton of water collection packs.

As soon as possible, go to grandpas shop, duel and win agains everyone inside his store, talk to him, he will say that you are an impressive trainer and invite you to a mini-championship to sponsor his shop, it's pretty easy, 2 battles against the anime duelists.

Make an Exodia deck your current deck. Go to the card shop. Talk to Grampa and he will ask you to duel against him using an Exodia deck. Both of the lifepoint scores will start at 10. The only way to win is to get all five pieces of Exodia into your hand. Bringing either players' lifepoints to zero will end the duel in a tie.

Look for the Scrolling bar to ask if Harpie types are Mai's alone. Construct a deck that contains no monsters with Harpie in their name and no spell cards and she'll duel with you.

Occasionaly the scrolling bar will say "Where is Joey?". When it says this go find Joey and talk to him (Not challenge), and if you own a Time Wizard you will face him in a pure luck duel with weak monsters, dice cards, and Time Wizard

Talk to Weevil Underwood with a deck where the only monsters are insects

Every Tuesday, the card shop closes. But every other tuesday, you can find Grandpa Yugi wandering around a random area. You can duel him and his exodia deck at that time.