Chunk is an alien-pig mechanic, the surrogate brother of Vix, and the best friend and surrogate uncle of Spark, and one of the secondary protagonists of Spark: A Space Tail.
Chunk is a pink anthropomorphic pig-like alien with tusks, and wears a blue shirt, beige aviator pants, beige gloves, black aviator boots, and a brown aviator hat with crooked goggles.