Naga is willing to do anything to defeat his old friend Balance in episode 31 of Uchu Sentai Kyuranger, The Naga Rescue Operation!
Space.31: The Naga Rescue Operation!
Directed by Hiroyuki Kato
Written by Nobuhiro Mori
Lucky and his team definitely defeated Don Armage in the past, but in the present day he still dominates the universe. They definitely have to defeat him in the present day. In order to do that, they have to take Naga back from the control of Akyanba.
It’s at that moment that Naga tries to defeat Balance no matter what, and he takes Kotaro and Garu as hostages to lure him. Balance stands against Naga in an attempt to restore him to his old self, but Lucky and Balance are attacked by Naga and then disappear.