Zetsuborg

Zetsuborg (ゼツボーグ) are the main monsters in Go! Princess Pretty Cure. They are created when the Three Musketeers trap people into the Gate of Desperation, which takes away the victims dream. When they are defeated by the first three Cures, they say "dreaming". However, when Cure Scarlet purifies them, they say "burning".

Appearance
Zetsuborgs are bipedal and have a giant black lock with a red light glowing from the keyhole in front of it. Their actual bodies take on an appearance related to the victim's dream.

In episode 13, Zetsuborgs with red locks and a light purple eye were introduced. These are created after Twilight uses her Dress Up Key to unlock the lock the general has before they summon the Zetsuborg.

When Lock powers himself up, he gains a new lock with red horns on it. Those have a glowing yellow eye and red horns as well.

Trivia

 * Their name is a hybrid between Zetsubō (Despair) and Cyborg.
 * When the Zetsuborgs are purified, their red light fades away in a way in which it looks like they are closing their eye and they say "Dreaming...".
 * If Zetsuborgs purified by Cure Scarlet's attack Phoenix Blaze, they say "Burning..." instead of "Dreaming..."
 * Like the Jikochuu and the Saiark, they are created without fusing objects.
 * They are voiced by Nakatsukasa Takayuki.
 * Each of the commanders use their names when they trap people's dreams. Close says "Close Your Dream!", Shut says "Shut Your Dream!" and Lock says "Lock Your Dream!".
 * There were two Zetsuborgs created from one person in episode 17.