A Boost Block[1][2], also known as Speed Booster Block[3], is a type of block that can only be destroyed by using the Speed Booster, Shinespark, or Ball Spark. They are found in Super Metroid, Metroid Fusion, Metroid: Zero Mission, and Metroid Dread.

In Dread, some obstacles with Boost Blocks are marked with yellow cracks, providing a subtle clue without needing to identify them using bombs or missiles. This is similar to Screw Attack Blocks, which are frequently marked with blue cracks. Unlike previous games, Boost Blocks are permanently destroyed, and Samus only needs to break one block to destroy all connected blocks in a chain reaction.

Official data[]

Super Metroid manual[]

Speed Booster Block SM.png "Blocks with the Speed Booster icon melt away when Samus runs into or over them at super speed."

Metroid Fusion manual[]

Speed Booster Block MF.png "Break through Boost Blocks after recovering the Speed Booster. Reaching the necessary speed requires some distance, so start running in the room next to the room containing Boost Blocks."

Metroid Zero Mission manual[]

Speed Booster Block MZM.png "Break through Boost Blocks by acquiring the Speed Booster and then charging through the blocks at supersonic speed. Reaching the necessary speed requires some distance, so you may have to start running from the next room over."