Episode 18

Episode 18, titled "Metal Beast in the Doomship" is the eighteenth episode of New Super Mario Bros. Z and the eighteenth episode of the Mecha Sonic Saga.

Synopsis
Mario and Bowser duke it out in a battle for Princess Peach and the 6 Chaos Emeralds! Mecha Sonic finds the Emeralds in the Doomship and the 3 battle it out.

Transcript
(Intro)

Episode Title: Metal Beast in the Doomship