Galvantula is a large quadrupedal arachnid-like Pokémon that resembles a tarantula. Unlike normal arachnids, Galvantula only has four legs rather than eight. Its rounded furry body is mainly a vivid yellow colour, with a grayish purple underbelly and stripes running along the back of its abdomen. It has deep blue tufts of fur sprouting from its sides. Its four hairy legs are blue and covered with yellow fur. Its has two large round blue eyes with black pupils, and four simple eyes on its forehead.
Galvantula has the ability to release two energy strings capable of creating a massive electric shock that can paralyze and kill prey. The dual energy strings are produced from Galvantula's fangs and can also form into a large net.