Relay Heihō

Relay Heihō are bomb-dropping Boo Guys from Super Mario World 2: Yoshi's Island, Yoshi's Island: Super Mario Advance 3, and Yoshi's New Island.

Super Mario World 2: Yoshi's Island
In Super Mario World 2: Yoshi's Island, they are found stationed in long rows within the ceilings of certain castles. They relay a single purple bomb, dropping it when a Yoshi approaches them. The Yoshi can perform a Ground Pound to startle them, forcing the bomb out of their grip. If they miss, the one who held the bomb will hang its head with an ashamed expression, the one who was supposed to receive it will rapidly look to both sides, and the others will shake their heads. If none of them were holding the bomb while the Ground Pound is being performed, the entire row will shake their heads. They will start over a few moments later. Due to their position, they cannot be defeated.

Yoshi's New Island
In Yoshi's New Island, Relay Heihō act the same, though they no longer change expression when the Yoshi ground pounds; the game has unused textures for those expressions in its data. They appear in King Clawdaddy's Sewer Castle.