Earth Tremor is a special move that appears in Paper Mario: The Thousand-Year Door. It requires 2 gauges of the Star Gauge to use and this move is learned after Mario gets the first Crystal Star after defeating Hooktail.
To use Earth Tremor, the player must press the whenever the line reaches the circle. The more times this is done, the faster the line will go. The player must fill up the gauge up to six times to deal the highest amount of damage (which is 6). Earth Tremor is considered one of the most useful Crystal Star moves due to it piercing enemy defense and can attack all enemies on the screen including flying and ceiling enemies. However, the gauge must be filled to the highest to achieve this.