Watch Slugterra: Slug Fu Showdown (2015) full movies online free cartoons.
Synopsis: Eli has added some awesome new slugs to his arsenal: the extremely powerful Elemental Slugs. But in order to control them, Eli must learn Slug Fu–the ancient form of slugslinging that Junjie mastered in the Eastern Caverns. Slug Fu is the art of guiding and controlling a slug in battle–a skill that only the greatest slugslingers can master.
Director: Clint Butler
Stars: Sam Vincent, Andrew Francis, Lee Tockar
More info: IMDB, Wikia