18-Volt

18-Volt is a major human character in the WarioWare series. He is 9-Volt's best friend and are both classmates. He has a very large stature and appears to be a teenager. His precise age is left unclear for most of the series, but in the French, Spanish and German dubs of WarioWare Gold, he states that he is 9 years old. Although 9-Volt and 18-Volt both appear to share the same love of Nintendo video games, 18-Volt seems to be more inclined to music, as WarioWare Gold reveals his main interest is in rapping.