Mega Block

Mega Blocks, also known as Big Blocks, are large Brick Blocks. They are often tougher than regular Brick Blocks, requiring a number of hits to destroy or being indestructible altogether. However, in some games, namely 2D Super Mario titles, they act like their smaller counterparts.

Super Mario Bros. 3 / Super Mario Advance 4: Super Mario Bros. 3
Big Blocks first appear in Super Mario Bros. 3 and its remakes, where they are only found in Giant Land. They are two times bigger than normal Brick Blocks; in spite of their size, they can be destroyed as any other Brick Block by Super Mario or a regular Koopa Shell. Exclusively in Super Mario Advance 4: Super Mario Bros. 3, they can also be broken by tail-whipping them as Raccoon or Tanooki Mario.

Super Mario Galaxy 2
They reappear in Super Mario Galaxy 2. However, unlike in Super Mario Bros. 3, these Big Blocks are indestructible (as they are too big) and act as platforms rather than Brick Blocks. These are found only in Supermassive Galaxy.

New Super Mario Bros. U / New Super Mario Bros. U Deluxe
These blocks reappear in New Super Mario Bros. U, working as they did in Super Mario Bros. 3, as they are able to be destroyed by Super Mario or Koopa Shells. They are found only in Soda Jungle, most notably in the Jungle of the Giants level.

Super Mario 3D World / Super Mario 3D World + Bowser's Fury
Big Blocks return in Super Mario 3D World and Super Mario 3D World + Bowser's Fury, where they are four times the length, width and height of normal-sized ones, or sixty-four times the size of a normal brick block. They can be destroyed by jumping beneath them and/or tail-whipping them five times, ground-pounding them in Super form or better, using a Mega Mushroom, or hitting a nearby POW Block. They appear in Super Block Land. Gray variants of Big Blocks known as Rock Blocks also appear, which are slightly smaller but much stronger. These blocks can only be destroyed by Mega Mario, Cannon Boxes, or Bob-omb explosions.

Super Mario Run
Mega Blocks appear under their current name in Super Mario Run, where they can be collected as buildings for Kingdom Builder.

Mario & Luigi: Paper Jam
Big Blocks reappear in Mario & Luigi: Paper Jam in the Safe by a Sandslide mission. They only require a single hammer hit to destroy.

Paper Mario: Color Splash
Big Blocks return in Paper Mario: Color Splash in Mondo Woods. They are normal Brick Blocks that were enchanted by Kamek. Big Blocks cannot be broken unless they are colored. They also appear in the Violet Passage in the coin segment, where they can be destroyed by Cannonballs, and in the Mustard Café, where one blocks the orange Warp Pipe leading to the surface at the end of the underground caves.

Paper Mario: The Origami King
Mega Blocks appear in Paper Mario: The Origami King, working like they did in Super Mario 3D World. They come in two sizes: twice as big (which take three hits to destroy) and even bigger (which take seven hits to break); successful hammer Action Commands lessen the amount of hits need to break them. They appear during the Trial of Power on Diamond Island.

Mario + Rabbids Kingdom Battle
Mega Blocks also appear in Mario + Rabbids Kingdom Battle, as the most basic form of cover in the game. They normally take three hits to destroy, but some weapons may destroy them instantly.