Junko (Voiced by Colin Murdock) is the 14-year-old flight engineer and heavy ballistics expert (in short, mechanic) of the Storm Hawks. Junko is a Wallop, a species of stereotypically dimwitted yet amazingly strong creatures that resemble humanoid rhinos. Junko aspires to overcome this stereotype, and hence is smarter than is considered normal for his species. He's still not considered bright, however ("The beacon tower! It stopped, uh, beaconing!", being an example). He's also weaker than normal for his species, though he is ten times stronger than a human, shown he was able to easily overpower Snipe. As a child, he was picked on for both these traits.
Junko quite literally collects random junk, keeping assorted spare parts in his closet. One of Junko's most noticeable traits is his cast-iron stomach which allows him to eat almost anything, including the lethal cuisine of the Colonel. Junko has allergies to and , which triggers when one of the two are in the area (Shown in the episode 'Terra Deep'). His sneezes are powerful enough to send groups of attackers flying.