Junior appears the same as he does in numerous Mario games, with a light green head, a convex tan snout, a single tooth, horns with brownish-orange rings and a dark yellow body. For attire, he wears his trademark bib.

His human puppet appearance depicts him with black eyes, orange eyebrows, a small clump of orange hair, fully white horns, and white skin. For attire, he now wears an orange t-shirt, a white bib that reads 'JR', green shorts, black wristbands, and orange shoes with yellow soles.

