Gurren Lagann (2007)

S1E27 The Lights in the Sky Are Stars

Simon and Nia finally find each other again. United as one, Team Dai-Gurren pools the strength of every member to summon the colossal Tengen Toppa Gurren-Lagann, a mech the size of a galaxy. With it, they launch an all-or-nothing showdown against the Anti-Spiral, a fight that will decide the very destiny of the universe.