3-2-1 Penguins! (2000)

S1E6 Moon Menace on Planet Tell-a-Lie!

The massive moon of Planet Tell-a-Lie has gone off course and is hurtling toward the surface at alarming speed! Jason and the Penguins must spring into action before the entire planet is crushed like a pancake. However, with the inhabitants only capable of lying, uncovering the truth behind the moon's chaotic descent proves to be a daunting challenge.