In the original Dragon Ball series, Jackie Chun blew up the frikkin' moon.
Now keep in mind that Freeza is like, a million times stronger (and faster, and more durable etc) than Jackie Chun. Yeah. Even with Freeza at 1%, Mewtwo stands no chance. --- We Endorse The Creation of Majora's Mask 3D: http://www.facebook.com/OperationMoonfall