Speed Booster

The Speed Booster is an item that first appeared in Super Metroid, in Norfair right after you beat Kraid and get the Varia Suit. It also appeared in Metroid Fusion, obtained when you defeat Serris in Sector 4(AQA) and in Metroid: Zero Mission again right after you defeat Kraid, in his own region.

The Speed Booster, as the name suggests, greatly increases your speed after an while running. In Super Metroid, the Speed Booster would only kick in if you were holding the dash button, but in Fusion and Zero Mission that changed, not needing the button anymore.

Uses
The Speed Booster is an item quite useful, as the follows:
 * Break Speed Booster Blocks, that have an yellow arrow on it(gray in Super Metroid);
 * Run fast;
 * By crouching during the dash, you will be able to shinespark;
 * Almost all non-boss enemies are affected to the Speed Booster;
 * Run over pit blocks;
 * Do a really far and high jump if you jump while dashing.