Zweilous is a quadruped Pokémon that has muscular front legs with two claws on each foot, but rear legs that are less defined and have two small, backward-pointing toes without claws. Zweilous's fur is a gray-black while the body is a dark blue. There are tufts of fur over two heads with rounded points at the top, and Zweilous appears to have no eyes. There are two wings on the black section of its body that resemble the wings of Giratina's Origin Forme. The fur stops at the chests and opens up to fuschia-colored striped bands on the side of Zweilous's legs. It is unknown if Zweilous is blind, like its pre-evolution.
- Evolve Deino