Dragon Ball Z: Lord Slug

Dragon Ball Z: Lord Slug is the fourth DBZ theatrical film, introducing Slug — an ancient Namekian who belongs to the forbidden "Super Namekian" class, endowed with power far beyond ordinary Nameks. Slug arrives on Earth to drain it of its resources and cold-freeze the planet, revealing himself to be the polar opposite of Piccolo in terms of what a Namekian can become. Piccolo's role in the film is significant because of this implicit contrast — the film directly engages with the idea that Namekians can develop in radically different directions based on their values.

Lord Slug is generally considered one of the weaker entries in the DBZ theatrical lineup, primarily because Slug himself, despite an interesting backstory as a Super Namekian, is given limited screen time to develop as a character before the inevitable climactic battle. The cold-freezing of Earth creates a visually distinctive environmental backdrop, and the brief appearance of a Super Saiyan-esque form by Goku — which the film somewhat ambiguously presents — generated fan debate about its canonical implications. Non-canonical and relatively short at 51 minutes, Lord Slug is recommended mainly for completionists and those interested in Namekian lore.