Moonbase Two
Moonbase Two is yet another a base... on a moon... orbiting Cybertron from the Generation One continuity family.
Animated Continuity
Moonbase Two was the second Moon base built after the Decepticon's conquest of Cybertron. Spike and Bumblebee were stationed on it. Like Moonbase One, it existed just long enough for Unicron to come along and eat it. Unlike Moonbase One, it actually got to violently explode in a (feeble) attempt by Bumblebee and Spike to destroy Unicron.