Rock Block

Rock Blocks are a variety of Blocks found in various games. Their physical appearance and function changes radically based on the series they appear in.

Super Mario World 2: Yoshi's Island
Rock Blocks were found in many levels of Super Mario World 2: Yoshi's Island. In the Yoshi series, Rock Blocks are large blue blocks made of a durable type of rock. Rock Blocks could only be destroyed with Yoshi Eggs.

Yoshi's Story
Rock Blocks reappeared in the sequel to Super Mario World 2: Yoshi's Island, Yoshi's Story. They are roughly the same as their previous appearance, as they could only be destroyed by Yoshi Eggs. Golden Rock Blocks also appeared in the game, but they could not be destroyed by any means.

Wario World
A different variety of Rock Blocks appeared as are obstacles that Wario encountered during the events of Wario World. They can be small or very large, but each has a weak side indicated by a cracked side with a bandage on it. Wario can break these blocks by punching or Ground Pounding the weak side. The blocks can also be destroyed by using a Piledriver, Wild Swing-Ding, or Power Throw. In some areas, Rock Blocks can move upward and slam down like a Thwomp to squash Wario.