Sewaddle is a caterpillar-like Pokémon, with a broad, apparently bitten leaf enfolding its head. Its large, spherical head is a pale shade of tan, with two sensory knobs higher up on it. Sewaddle's eyes are dark and circular, with a crescent-shaped, toothed orange snout, and the underside of its face and neck is white. The rest of Sewaddle's body is segmented and green, with three rows of stubby, spherical orange legs.