Best Deck

Ya dude, every deck is going to be beat once or twice. There is no deck that can't be unbeatable. But, you could make a deck of monsters that make them unbeatable in battle or a cloudian deck, that's all.

Honestly, there is no deck that will never be beaten. Many people mistake Yu-Gi-Oh! For one of those "I'll load my deck with strong cards!" kind of game. While I agree that strong cards do make a difference, they can be utterly useless if one doesn't employ strategy into their duels/decks. It makes no difference how good your cards are if you can't use them right. If you wanted to cheat you way to the top however, you can use this code: D21C31BE 0100AA00 121C31BE 0000EA00 (no card limit, e.g. 5 card deck *Exodia*). I only ask that you don't use this to try and gain a good rating via wi-fi. Trust me when I say that some people will not ever duel with you again and your bad reputation will spread and then nobody will duel on wi-fi. I think I've pretty much answered your question, but just in case: Find cards that work for you and with you, and put some strategy and thinking into your game. It makes a load of difference.

Like Yoshi said, there is no sure fire victory deck. However a deck that is hard to beat is a cloudian theme deck. Their abilities combined with spell and trap cards that go with them make it a strong deck

if you have an action replay that has the no ban list cheat. you can make a beast exodia deck.
monsters
3x alien shocktroopers
3x aqua madoors
3x left arm of forbidden one
3x left leg of forbidden one
3x right arm of forbidden one
3x right leg of forbidden one
3x exodia the forbidden one
3x renge, gatekeeper of dark world
1x exodia necross
1x exodius the ultimate forbidden one
3x sangan

Spells
2x card destructions(optional)
1x card trader
1x contract with exodia
2x dark holes
3x graceful charity
3x pot of greed
3x raigekis
1x riryoku
3x fairy box
2x gravity bind

If you have an action replay then...
No deck limit
Exodia x1
Right arm x1
Left arm x1
Right leg x1
Left leg x1
It's impossible to lose

This is a hard to beat deck it's called the reverse of ra you need have a deck with 1 the winged dragon of ra and the rest are spell cards you need reasoning,fuhma shuriken and reversal quiz(premature burial too just in case) first you have to have al those spell cards in your hand then activate reasoning to sp summon ra then convert all your life points but one (if sent to the graveyard use preamuture burial to bring it back) then set fuhma shuriken afterwards activate reversal quiz then select spell cards afterwards youd win the duel(if you drew ra use cards like magical mallet to sennd it back to your deck) hope this helps

I play with a cyber dragon deck ^^ Fuse a couple of machine monsters to get Chimeratech Overdragon, preferably with power bond. After that limiter removal. Megamorph if possible. If you combine say 5 monsters (I usually do) it is 5x800 x2 (powerbond) x2 (limiter removal)= 16000. Becomes 32000 with megamorph. You could, for example play megamorph after you have payed the power bond toll. Throw in cyber phoenix and star bow ceal in afterwards and you have the win This all in combination with deck thinners and traps and you have a very strong deck.

If you want a really good deck, try my Leveled Boss style. Use Silent Swordsmen/Armed Dragons. Don't forget to put in Level Up!s and Level Modulations. Add a few stalls like Aqua Madoor, Lightning Vortex, and Wall of Revealing Light to make it even better. Personally, I also have Blowback Dragon and Mystic Wok. Mystic Wok to tribute a monster that is about to be killed by an effect anyway, and Lightning Vortex for obvious purposes of knocking down an over-powered field. Works especially good against Field Spell decks that revolve around their field staying up, due to Silent Swordsman LV7's effect. Finally, add Jinzo if you don't want the field clogged down. I don't use Jinzo merely because I don't own one.

I too play a Chimeratech deck, but it's better to use Future Fusion, to take out every machine monster in your deck, then make sure all machines in your hand make it to the grave. Then activate Overload Fusion, to remove all of them in play to make Chimeratech Overdragon. Lets say you have 25 monsters. 25x800=20000. Activate Limiter Removal, 40000. Activate Megamorph, 60000. 2nd Megamorph, 80000. Put down 2nd Limiter Removal now, 160000. Virtually indestructible.

too play a Chimeratech deck, but it's better to use Future Fusion, to take out every machine monster in your deck, then make sure all machines in your hand make it to the grave. Then activate Overload Fusion, to remove all of them in play to make Chimeratech Overdragon. Lets say you have 25 monsters. 25x800=20000. Activate Limiter Removal, 40000. Activate Megamorph, 60000. 2nd Megamorph, 80000. Put down 2nd Limiter Removal now, 160000. Virtually indestructible.

I know only one way to make a unbeatable deck and I will not lose a match because I have 42 cards in my deck and I need 54 cards in the deck!

Well I just use trap jammer x3 magic jammer x3 level up x3 and a few level type monster x3 monster reborns x3 premature burial x2 spirit of the reaper x1 rageki x2 trap hole x1 and a change of heart x3

Chimeratech deck, not unbeatable but use drawing cards, future fusion, overload fusion, machine monsters, 3 cyber dragons and voila, hope this helps.

Chimeratech otk is really nice.heavy storm, future fusion, overload fusion and BOOM! You have a monster with at least 15,000 atk. Then, use heavy storm to ensure victory. You don't even need limiter removal. In fact, I suggest you NOT to use it. There is a possibility that the opponent has a kuriboh.
Hope this helps

I personally disagree with a chimera tech deck. It is quite powerful but a card like sakuretsu armor or mirror force can destroy it if you go into battle and your left with no monsters because they're all removed from play (providing you use overload fusion). Even if you did have a heavy storm, that can't be activated till he is on the field and your opponent hasn't retaliated in which case, bottomless traphole, traphole, torrential tribute and cards like them can destroy it which will also leave you with a deck that doesn't have monsters.

Use the Dark Magician you fool!