They are large black amalgamations of Shadow Bugs with two jointed heads and long, two-ended blades on either arm. They lack any facial feature, except for very small bright eyes - although their appearance roughly reminds two slim, conjoined twins.
Their body has a peculiar trait as well: a sort of "core" at its center, a bright red, glowing orb. This core is described as their weak point.
Shaydas always levitate and never touch the ground.
In the Subspace Emissary
Shaydas levitate and can move across the ground quickly in order to chase the player. Their moves have wide hitboxes.
Shaydas have four main methods of attacking:
While Shaydas are barely scratched by most attacks, attacks deal double damage to them while they are in a vulnerable stance, except for Grass, Slash (both deal 1.6× damage), and Indirect attacks (which deal base damage). Attacking them at this time is the best way to defeat them. Although their trophy description states that the core is their weak point, hitting any part of them while they are open while preparing to attack, indicated by their core growing larger, will deal high damage, while they will resist damage heavily when not vulnerable, regardless of where they are hit.
Shaydas usually appear in caves, although they can rarely be fought on open stages.
Names in other languages