Zone Speed is a special move in Mario Tennis Aces. When active, the world turns into slow motion. The player, however, is not affected and can run at normal pace, allowing them to reach any balls hit to the other side of the court they cannot reach at normal speed.
Zone Speed depletes energy when used, and therefore can only be used as long as the player has energy saved (similar to Zone Shots). Despite this, they are useful against the opponent's Special Shot or Zone Shot, as the player can time the block easier.
When the energy gauge is not full and the player's character is not on the star, they can use Zone Speed. Pressing , , or starts using it, and letting go of the pressed button will stop it.
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