Until Ure In My Arms Again - S1.E7

This episode revolves around a brother and a sister, who usually stick together, yet the brother is slowly rejecting the sister. The brother recently (after the pillar of light) developed a want to unassemble everything and remove the useless parts. When he thinks that Paisely Park is useless, he attempts to take it apart, yet relizes that he doesn't have any powers. His sister has the power to grant his wishes.