Voltron Force (2011)

S1E26 Black

In the climactic showdown of Voltron Force, Castle Doom evolves into the most colossal Robeast to date, launching a devastating attack aimed at annihilating the Galaxy Alliance. As the stakes reach new heights, the team must rally their strength and devise a plan to confront this formidable threat and protect their universe from utter destruction. The battle tests their limits and unity in a fight for survival.