Gravattack is a Galilean (From Galileo Galilei, the astronomer who discovered the gravity) from the planet Keplorr (From Johannes Kepler who discovered the laws of planetary motion). He is a living rock armored alien with a giant mouth and a molten (planetary) core at the center of his body and has the Omnitrix symbol on his forehead.Gravattack has telekinesis powers by manipulating gravity fields of him and others, changing the mass, making it heavier or slighter and the air, being able to float. Also with his gravity manipulation, he is able to make objects "orbit" around him like a planet and he can fold himself into a plantoid for better influence. He first appears in "A Jolt from the Past" to fight Fistrick in his Class 12 Armored Mecha Suit.