Yu-Gi-Oh Millennium Duels

This works for all the single player campaign.

Use Burn effect cards you can search for them by searching for cards that decrease LP.
The AI rarely uses many trap cards to counter burn cards.
The AI always attacks Zoma the spirit if you activate it right after they attack one of your monsters.

A few decks this wont work well against such as Evilswarm. The first few decks you face in expert mode are the hardest to beat. Also alot of yu-gi-oh players hate burn deck so some might rage quit if your using one online.

The deck I used in this video is

Monsters

Des Koala x3
Ebon Magician Curran x3
Fire Trooper x2
Gorz the Emissary of Darkness x1
Lava Golem x2
Mecha Bunny x2
Reflect Bounder x2
Solar Flare Dragon x3
Caius the Shadow Monarch x3
Stealth Bird x2
Toon Cannon Soldier x3 (Regular Cannon Soldier can be used to and has same effect)
Volcanic Slicer x2

Spell Cards

Black Pendent x1
Chain Strike x2
Dark Room of Nightmare x3
Ookazi x3
Thunder Shot x1
Wave Motion Cannon x3

Trap Cards

Ceasefire x1
Cemetery Bomb x2
Dimension Wall x1
Just Deserts x3
Magical Cylinder x3
Nightmare Wheel x3 (Use this on Lava Golem once you get it it out on other players field. XYZ's can still use their detach effect when hit with this card)
Secret Barrel x3
Zoma the Spirit x2
Ojama Trio x1 (Use this to clog the field to do big damage then use other spell and trap cards)

Other cards that work in Burn decks alot of these only work with certain monster types.

Blizzard Falcon
Blast Sphere
Fencing Fire Ferret
Tremendous Fire
Thestalos the Firestorm Monarch
Stamping Destruction
Spiritual Fire Art Kurenai
Spell Shattering Arrow
Solar Ray
Poseidon Wrath
Ominous Fortunetelling
King Pyron
Fairy Archer
Darkworld Shackles
Dark Snake Syndrome (This can kill you both players of quick so is risky)
D.D Dynamite
Creepy Coney

Watch out for Prime Material Dragon since its effect reverses all Burn effect to heal the Opponent instead the card has trap protection for alot of well used cards like Mirror Force as well.

This works for all the single player campaign.

Use Burn effect cards you can search for them by searching for cards that decrease LP.
The AI rarely uses many trap cards to counter burn cards.
The AI always attacks Zoma the spirit if you activate it right after they attack one of your monsters.

A few decks this wont work well against such as Evilswarm. The first few decks you face in expert mode are the hardest to beat. Also alot of yu-gi-oh players hate burn deck so some might rage quit if your using one online.

The deck I used in this video is

Monsters

Des Koala x3
Ebon Magician Curran x3
Fire Trooper x2
Gorz the Emissary of Darkness x1
Lava Golem x2
Mecha Bunny x2
Reflect Bounder x2
Solar Flare Dragon x3
Caius the Shadow Monarch x3
Stealth Bird x2
Toon Cannon Soldier x3 (Regular Cannon Soldier can be used to and has same effect)
Volcanic Slicer x2

Spell Cards

Black Pendent x1
Chain Strike x2
Dark Room of Nightmare x3
Ookazi x3
Thunder Shot x1
Wave Motion Cannon x3

Trap Cards

Ceasefire x1
Cemetery Bomb x2
Dimension Wall x1
Just Deserts x3
Magical Cylinder x3
Nightmare Wheel x3 (Use this on Lava Golem once you get it it out on other players field. XYZ's can still use their detach effect when hit with this card)
Secret Barrel x3
Zoma the Spirit x2
Ojama Trio x1 (Use this to clog the field to do big damage then use other spell and trap cards)

Other cards that work in Burn decks alot of these only work with certain monster types.

Blizzard Falcon
Blast Sphere
Fencing Fire Ferret
Tremendous Fire
Thestalos the Firestorm Monarch
Stamping Destruction
Spiritual Fire Art Kurenai
Spell Shattering Arrow
Solar Ray
Poseidon Wrath
Ominous Fortunetelling
King Pyron
Fairy Archer
Darkworld Shackles
Dark Snake Syndrome (This can kill you both players of quick so is risky)
D.D Dynamite
Creepy Coney

Watch out for Prime Material Dragon since its effect reverses all Burn effect to heal the Opponent instead the card has trap protection for alot of well used cards like Mirror Force as well.

I have used one deck to complete all the expert duels.
An Inferno Tempest deck which is linked below will be able to beat every duel even on expert mode.

This deck is a fast pace LifePoint/Deckout Deck.

Additionally this deck will give you maximum points which will unlock more cards per duel and maximise LP damage which will work towards your 'one better' achievement.

*****Updated Video!!!

I have to agree with Cawood that for the most part, that the burn strategy is the best way to go if you can gather the necessary cards to do so. However, unless you have played through 5ds and uploaded cards you won from that game, the cards you win through Single Mode aren't always the best.

The Expert Mode will throw all of the toughest decks at you. Good traps like S. Armor and Magic Cylinder are a must along with 1-2 copies of the Swords of Revealing Light.

If you are having trouble, be patient and keep note of that deck's particular strategy and how to counter it. For example, when facing Marik in a Match mode, as long as you shut down his Jam Breeding Machine card you will win.

Other people I had the most trouble...

Solomon (Exodia deck): A very good deck that even the best decks can't overcome if it's set up correctly.

Zone (Final Countdown deck): Puts pressure on you, but the burn cards can get him pretty quickly.

Dr. Faker (Dark World deck): Get Shadow Imprisoning Mirror if you want to stand a better chance here.

Vector (Evilswarm deck): Ugh...this bastard is tough because he can counter just about every strategy you throw at him.

Again, patience is the key, and I'll admit I needed to purchase the Fire Fist deck in order to beat Vector and finish the Mode. If you're a good Yu-Gi-Oh player, you will eventually get this!

I used Chain draw Exodia Deck

Monsters (15)
5 Pieces of Exodia
Blue Eyes White dragon x3
White stone of legend x3
Royal Magic Library x3
Blue Eyes Toon Dragon x1

Spells (25)
One Day of Peace
Spell Power Grasp x2
Magical Citadel of Endymion x1
Magical Mallet x3
Trade in x3
Cards of Consonance x3
Toon Table of Contents x3
Upstart Goblin x3
Pot of Duality x1
Broken Bamboo Sword x2
Golden bamboo sword x3

You don't win 100% of the time..if you don't win buy turn 3 just surrender and re-try its pretty easy

I have to agree with Cawood that for the most part, that the burn strategy is the best way to go if you can gather the necessary cards to do so. However, unless you have played through 5ds and uploaded cards you won from that game, the cards you win through Single Mode aren't always the best.

The Expert Mode will throw all of the toughest decks at you. Good traps like S. Armor and Magic Cylinder are a must along with 1-2 copies of the Swords of Revealing Light.

If you are having trouble, be patient and keep note of that deck's particular strategy and how to counter it. For example, when facing Marik in a Match mode, as long as you shut down his Jam Breeding Machine card you will win.

Other people I had the most trouble...

Solomon (Exodia deck): A very good deck that even the best decks can't overcome if it's set up correctly.

Zone (Final Countdown deck): Puts pressure on you, but the burn cards can get him pretty quickly.

Dr. Faker (Dark World deck): Get Shadow Imprisoning Mirror if you want to stand a better chance here.

Vector (Evilswarm deck): Ugh...this bastard is tough because he can counter just about every strategy you throw at him.

Again, patience is the key, and I'll admit I needed to purchase the Fire Fist deck in order to beat Vector and finish the Mode. If you're a good Yu-Gi-Oh player, you will eventually get this!