No, The Six Samurai Cards were only ever released as Trading Cards, and not in the Episodes itself
no one yet.
The legendary Six Samurai are a new archtype in the yugioh card game world that are coming out in the storm of ragnarok booster pack coming out feburary,9,2011 if you play yugioh with six samurais you should get these cards
The Six Samurai are a series of Yu-Gi-Oh monsters representing a famous band of samurai warriors, as well as a few associated characters like their grandmaster. Legendary Six Samurai are the previous generation of Six Samurai, and you can see that they still exist in the present time, ie, Legendary Six Samurai Shi En -> Great Shogun Shien, Legendary Six Samurai Enishi -> Enishi - Shien's Chancellor, Legendary Six Samurai Kageki -> Chamberlain of the Six Samurai, Legendary Six Samurai Mizuho -> Hand of the Six Samurai, Legendary Six Samurai Shinai -> Spirit of the Six Samurai, Legendary Six Samurai Kizan -> Grandmaster of the Six Samurai.
Seto Kaiba only appeared in episode 76 in yugioh gx.
When a card refers to a 'Six Samurai' monster, it means any monster with the words "Six Samurai" in the name. Therefore those cards will affect monsters such as Hand of the Six Samurai, and the 'Legendary Six Samurai' monsters.
Episode 106
Episode 57
Episode 55
The episode in which Emily goes Super Samurai has not aired yet and upcoming episode descriptions have not revealed in regards to the episode in which she'll go Super Samurai.
episode 1
they already did
Yugioh Episode 55