it is avadable in the crimson crisis pack
Summon it in a duel
If you are talking about unlocking the duelist, there is no "Stardust Dragon" duelist. There is a "Stardust Dragon/Assault Mode" duelist who you unlock by summoning "Stardust Dragon/Assault Mode" in a duel. If you want to know where to find the card, it's in the The Duelist Genesis booster pack, which you unlock by defeating the following duelist three times in story mode: Barclay, Shuji, Taniyama, Ellison Noula, Skathi, Yagishita, Geruzet, Motoi, Kyono, Fudagawa, Dio, and Vega.
Power Tool Dragon is not an available card or opponent in Yu-Gi-Oh! 5D's Stardust Accelerator: World Championship 2009.
You unlock the pack at the store and then you buy it.
Synchros is a mechanic in Stardust Accelerator the player is not able to use till they have almost finished the game. It specifically starts to be usable to the player once they unlock the Duelist Genesis pack.
"Stardust Dragon" is in the booster pack The Duelist Genesis.To unlock this booster pack, you must defeat the duelists Barclay, Shuji, Taniyama, Ellison Noula, Skathi, Yagishita, Geruzet, Motoi, Kyono, Fudagawa, Dio, and Vega five times each. They are located in the Prison Facility.
Defeat the following duelists 5 times each: Lutz, Mana, Shirase, Kurihara, Haruka, Giado, Albie, Bass There in New Domino City.
"Stardust Dragon" and "Red Dragon Archfiend" are in the booster pack The Duelist Genesis.To unlock this booster pack, you must defeat the duelists Barclay, Shuji, Taniyama, Ellison Noula, Skathi, Yagishita, Geruzet, Motoi, Kyono, Fudagawa, Dio, and Vega three times each. You could find them in World Championship Mode in CPU Duel or you can meet them in the prisoner facility in New Domino City.Once you have "Stardust Dragon" and/or "Red Dragon Archfiend" listed in your Card List, you can go to the Shop menu in World Championship mode, select Password, and enter the password for "Stardust Dragon", 44508094, or "Red Dragon Archfiend", 70902743.
There are 2 ways to get Stardust. One is to unlock the pack "The Duelist Genesis", which can be obtained by defeating the following duelists 3 times each: Barclay, Shuji, Taniyama, Ellison Noula, Skathi, Yagishita, Geruzet, Motoi, Kyono, Fudagawa, Dio, and Vega. Stardust Dragon appears as an Ultra Rare in that pack. The other way is to use the card password for Stardust Dragon (44508094) but only after you've unlocked the card, meaning you'll need either a high completion percentage of cards on the Duelist Genesis pack or to have previously obtained Stardust Dragon in the Duelist Genesis pack. Of course you could always cheat. :P
The fourth pack you can get. It is Dark Revalation Volume 2.
Its simple just beat the game and buy all of the structure decks.
Answer courteous of Gamespot.com: Unlock 20 Tag Opponents in WC mode to unlock the Tag Tournament.