In "Countdown to Destruction: Part 2", Bulk and Skull undergo their most noteworthy change. The Space Rangers had battled the invading forces of Astronema, but were overwhelmed and forced to retreat. Astronema demanded that the Rangers be turned over to her or else Earth would be destroyed. Everyone in Angel Grove had lost hope, but Bulk and Skull still had faith that the Power Rangers would save them, with Bulk telling everyone that the Rangers have never let them down before and that they have to believe they will be there for them. The next morning, the Rangers (sans Andros, who left to board the Dark Fortress) intend to turn themselves in to save Earth. However, Bulk suddenly announces he's a Ranger, prompting Skull, Professor Phenomenus and every other present civilian to do the same. A frustrated Astronema orders their destruction, but then the real Space Rangers reveal themselves (Bulk is stunned to learn the Rangers were "them"). As the Rangers battle Elgar, the Quantrons and the Piranhatrons, Bulk & Skull have arguably their most defining moment. Bulk, inspired by the Rangers, rallies the civilians together to "get in there" and he and Skull lead the charge to help the Rangers in battle, Bulk fighting off a Quantron to protect Zhane and Skull pulling a Piranhatron off of Ashley and throwing it away. After Zordon's energy wave destroys the invading forces, Bulk, Skull and Professor Phenomenous are among those celebrating.