A Shaydas (ジェイダス Jeidasu, "Jdus") is an enemy in Super Smash Bros. Brawl's Subspace Emissary mode, first appearing in the Lake Shore level. It appears to be very powerful and has a weak point on its chest, which looks like a shining red sphere. It is made up of a group of Shadow Bugs. It is very skilled with the two blades it carries, and is seen as a double-headed ninja-like shadow. It can teleport when stuck in an area and can also fly. Its attacks (a double slash and a triple slash) all involve swords. A Shaydas can also hold back both of its "arms" and then do one large slash as well. This will however leave it vulnerable to attacks.
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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!