Voltron, Defender of the Universe: Lion Force

Horrible little evil mice appear in the Castle of Lions, eating through the wires and circuits of the complicated computers that the run the control room. Cheeser and the Space Mice fight back, but then Lotor appears with a Robeast. The team can't operate the underground shuttles that they need to reach their lions because of the damage to the main computer. With Lotor wreaking havoc, the team makes a desperate run to reach the Lion's hiding places on foot!