POW Block

POW Blocks are a type of block from the Mario franchise, in which they first appear in the arcade title Mario Bros.. Hitting a POW Block generally causes an area within its range to briefly shake, often resulting in others being stunned. POW Blocks make their first Sega-related appearance in the crossover title Super Smash Bros. Brawl. They were also introduced into the Sega-produced Mario & Sonic series in the Wii version of Mario & Sonic at the Olympic Winter Games.

Super Smash Bros. Brawl
The POW Block makes an appearance in the Super Smash Bros. Brawl stage Mario Bros., where it can be used to temporarily stun all enemies onscreen, much like in Mario Bros.. In doing so, fighters can pick up enemies and throw them at their opponents. A POW Block can only be hit a few times before disappearing, although it eventually reappears in the same spot in the stage.

Super Smash Bros. for Nintendo 3DS / Wii U
POW Blocks appear as throwable items in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U. If a POW Block is thrown onto the ground, it shakes the arena, and any opponent standing on the ground or a platform take damage.

Super Smash Bros. Ultimate
POW Blocks reappear as items in Super Smash Bros. Ultimate. The POW Blocks in the original Mushroom Kingdom stage from Super Smash Bros. and the Mario Bros. stage also return with those stages.

Mario & Sonic at the Olympic Winter Games
In the Wii version of Mario & Sonic at the Olympic Winter Games, POW Blocks appear as an item in Dream Ice Hockey, where they will knock over all of the characters on the opposing team after a short amount of time. They also appear as an item in Dream Snowball Fight, where they briefly stun all of the opposing team.

Mario & Sonic at the Sochi 2014 Olympic Winter Games
POW Blocks appear on the Coin Street rink of Snow Day Street Hockey in Mario & Sonic at the Sochi 2014 Olympic Winter Games. There, if an opponent hits a POW Block, all of their opponents get knocked down and become briefly stunned. Shortly after being used, the POW Blocks respawn in their positions.

Mario & Sonic at the Rio 2016 Olympic Games
POW Blocks appear as items in Boxing Plus in the Nintendo 3DS version of Mario & Sonic at the Rio 2016 Olympic Games. In this Plus Event, the POW Block stuns the opponent and prevents them from moving, performing punches and guarding. They also appear as an item in Football Plus, where three will fall one after the other by the character that received the item and knock over any other characters, including goalkeepers, in the surrounding area.

Mario & Sonic at the Olympic Games Tokyo 2020
In Mario & Sonic at the Olympic Games Tokyo 2020, POW Blocks reappear as items in the Dream Event, Dream Karate.