The Keroro Platoon's members are very dreadful to have seen! but they aren't costumes, are monstrous during the night of Halloween. The concepts are published only four members and there to show the king of the night: Keroro.
They are based on an episode 133 of Sgt Frog that would become the sinister that night, these are so fucking awesome and badass!!
You can show the four members: