Koopa Shellceiver

"Ready? I'm monitoring through this Koopa Shellceiver!"

- Army Hammer Bro

The Koopa Shellceiver is a device that allows the Koopa Troop to communicate in Super Princess Peach. During the game's intro, a Goomba walks into Peach's Castle with the Vibe Scepter. Army Hammer Bro then waits for it to give the all clear (which the player can speed up by using the Nintendo DS microphone), which signals the Hammer Bros.' attack on the castle.