Shaydas (ジェイダス Jeidasu, "Jdus" in Japan) is an enemy in Super Smash Bros. Brawl's Subspace Emissary mode. It appears to be very powerful and has a weak point on its chest being a shiny red sphere. It is made up of a group of Shadow Bugs. It is powerful with two swords, and is seen as a double-headed ninja-like shadow. It can teleport when stuck and can also fly. Its attacks include a double slash and a triple slash. A Shaydas can also hold back both of its "arms" and then do one large slash - however the red core is completely open to attacks while doing so.
An odd enemy with two heads. Its legs might suggest that it's a beast of some sort, but in actuality, a Shaydas is formed by swarms of Shadow Bugs. Maybe that's why recklessly attacking it will do no good--you must strike its pink core to defeat it. Just watch out for the giant blades that it brings to the party. Mind the blades, and pick your attacks wisely!