MarioWiki
MarioWiki

Fake Blocks are enemies from Super Mario 3D Land. When they are sleeping, they look just like regular blocks, except for their eyes. When they wake up, they have a tail and quickly jump around and try to smash Mario and Luigi. They are defeated the opposite way than most enemies: by hitting the bottom of them. Another way to defeat them is by fooling them to jump into the sky. Alternatively, tail smashes and ground pounds will put an end to these menaces.

Trivia