Bomp

Tsukidashi-kun (also known as Pushy Walls) are a sub-species of Thwomp that first appeared in Super Mario 64. They are living, pushing, protruding stones that act as obstacles in many games.

Super Mario 64 / Super Mario 64 DS
Tsukidashi-kun made their first appearance in Super Mario 64 and its Nintendo DS remake Super Mario 64 DS in the course Whomp's Fortress. At the beginning of the course, they go through a pattern of pushing, trying to shove Mario off a cliff, and to his death. They also appear in many levels including Lethal Lava Land. The beginning and end Tsukidashi-kun in Whomp's Fortress are thinner than the center Tsukidashi-kun. Their eyes have a blue outline with blue pupils. The eyes are also looking like peeling out, thanks to the thick outline on the eyes. In Super Mario 64 DS, the eyes were removed on the Tsukidashi-kun.

Super Mario Galaxy
Tsukidashi-kun also appear in Super Mario Galaxy, but with a different, more Thwomp-like look and face. They first appeared in Buoy Base Galaxy and later appeared in the Freezeflame Galaxy.

Super Mario Galaxy 2
In Super Mario Galaxy 2, they appear with the same role and appearance as in Super Mario Galaxy. They appear in the Fluffy Bluff Galaxy and the Throwback Galaxy, which is a remake of Whomp's Fortress. In the Fluffy Bluff Galaxy, Tsukidashi-kuns can assist the player in climbing the slope where they are located, but in the Throwback Galaxy, their purpose is more like that of an obstacle.