Inviso

"Peek a boo! Who are you? Peek a bee! Can't find me!"

- Inviso

Inviso is a boss from Yoshi's Story. He is at the end of The Tall Tower. Inviso's appearance is somewhat hidden, as he is invisible (minus the fact that the world reflects on him). Inviso attacks by turning invisible and trying to bump into a Yoshi while summoning Peepers. The Yoshi can defeat Inviso by hitting him with three eggs. Inviso seems obsessed with the game of Peek-a-Boo.

Similar invisible ghosts, called Invisighouls, appear in Yoshi's Island DS, along with a boss known as Hector the Reflector.

Profiles and statistics
I don't know where you are, Inviso.
 * Shogakukan guide: どこにいるやら、なんにもミエンデ.