Mario Block

From the Super Mario Wiki

The title of this article is conjectural; an official name for the article's subject has not been found, so it has been given a fitting title by the editors. If an official name appears, it is requested that the article should be moved to the correct name.

Not to be confused with M Block.
Mario Block
A red block, with Mario's "M" logo on it.

First appearance

New Super Luigi U (2013)

Latest appearance

New Super Mario Bros. U Deluxe (2019)

Effect on player

Changes the character control physics so that they are identical to New Super Mario Bros. U.
“Hitting this block will change the character physics to match those of New Super Mario Bros. U. However, Nabbit's physics won't change. This effect will last until you exit the course.”
In-game text, New Super Luigi U

The Mario Block is a type of block that appears in the Wii U title, New Super Luigi U. In this game, the block appears at the beginning of levels, but only after players defeat Bowser. Hitting the block allows the player to switch to the physics of New Super Mario Bros. U, with lower jumps and better traction. It will not affect Nabbit and does not appear if Nabbit is used single player (this is untrue for New Super Mario Bros. U Deluxe). The first time the player hits the block, a message will appear describing the block's effects.

If the player hits the Mario Block for the first time in a play session (subsequently triggering the message describing the block's effects) before the "time warning" sound effect finishes playing, the sound effect will start over after the player has finished reading the message.