Peekaboo

Peekaboo is a virus appearing in the Mega Man Star Force series. They look like large grey ghosts with their hands covering their faces. When they do show their face, it lets out a sonic wave, the "Ghost Pulse". They also have faces on their hands, but these hands are much happier than the actual face. When Peekaboo reveals his mouth, a small cannon can be see. They have a huge resemblance to te pokemon Darkrai.

Another version is the Wavyboo. The Wavyboo is green and has higher health.

HP: 100

Wavyboo HP: 130