18-Volt is a character in the Warioware series. He is a hardcore video game fan and best friend to 9-Volt.
Regardless of his large size, he's actually an elementary school student, in 4th grade, the same grade as his best friend.
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18-Volt and his best friend 9-Volt
18-Volt about to enter a rap battle 13-Amp with 9-Volt about to DJ