S-21B

The last S-series Robot-type enemy, this creature is also the strongest among all the Robot-type enemies. Despite this, its stats aren't much higher than those of the S-11A, although it still keeps the Wind resistance found in its predecessor, so try to fight carefully against it, Paralyze it as soon as you have the chance, and then destroy it using Song Magic, a Flipsphere or a Ultra Supermove.