Onion Duck evolves into Onion Wanderer after carrying Onion for three blasts in a matchup.

The Onion Swimmer evolves from the Onion Duck (Ghaleel lookalike) and is the final evolutionary type.

The Onion Swimmer has a similar appearance to the Onion Duck, but with white feathers, and the V-shaped markings of the Onion Duck have become thicker and resemble linked eyebrows. In each hand, the Onion Wanderer wields a sword made of onion stems and a shield made of onion leaves.