Rocket Guy

Rocket Guys are Yellow Shy Guys who fly on Rockets. Rocket Guys have appeared only in Yoshi's Island DS. They first appear in outer space where Yoshi is also in a rocket. In outer space, they are invincible and if you merely touch them Yoshi's rocket will explode and you will have to restart at the nearest check point. Rocket Guys are unique, because they are the only enemies that can only be defeated, and thereby added to the Enemy Museum, during a boss battle (see Moltz the Very Goonie). They would fall on Yoshi and are like the planetoids - they could defeat the Yoshi. Eggs turn it around during the boss battle and the museum, and they can be killed by eating the riders, though the rocket continues on. That will add it in the museum.