if you are talking about wc 2009 then play story mode up to where blister Luna and Leo teach you about td it should now be unlocked
Answer courteous of Gamespot.com: Unlock 20 Tag Opponents in WC mode to unlock the Tag Tournament.
Complete 18 challenges to unlock mace windu.
get to level 4
Unlock and beat the mission Terrifing Majin Buu
you need to win at lest 50 duels in free duel mode
You need to duel lots of people in story mode 5 times (including tag duels) to unlock opponents in WC mode. Then duel the opponents in WC mode 5 times each (including tag duels) to unlock the World Championship Editions Packs at the shop. for the first world championship pack you need to beat 10 duelists 5 times for the second one you do the same but with CPU tag duelists then 20 for each then 30 then i have heard that possibly beat 36 tag duelists 5 times and you get a really good pack (my fav).There are 8 championship packs all of which hard to get but worth it cause some of the most useful cards are in it.Nope there are 8 WC edition packs all together
Answer courteous of Gamespot.com: Unlock 20 Tag Opponents in WC mode to unlock the Tag Tournament.
Beat a character in Story Mode 10 times to unlock a new tag partner. (Blister sucks)
Complete 18 challenges to unlock mace windu.
You can find them here: http://www.gamespot.com/ds/puzzle/yugiohworldchampsionship2008/hints.html?om_act=convert&om_clk=gsbottomnav&tag=quicklinks;cheats
If your play time is at 200:00 hours then you will unlock marik
yes.
You have to get through the world of darkness, the tag(team) dueling world, and pass the gate challenge. TIP: To get an awesome tag partner log into wifi and go to the leader board, you can download the ghost data for the worlds best yugioh wc 2008 players, you can then make them your tag partners.
you have to unlock 15 level 1 2 3 wc mode duelists for more info go on game faqs yugioh 5ds sa wc 2009 and click the walkthrough its very detailed
for the first 4 dulesists u hav to beat each of them 3 times then u unlock a card pack. After u beat the level 4 duelists 5 times, then u only unlock a new pack if u beat the limited duels and theme duels till u get to level 3 on them.
Unfortunately, the only way to unlock him is to have beaten him the first time, if you lost against him and saved, you can never unlock him.
complete 27 challenges to unlock Plo Koon