18-Volt - Super Mario Wiki, the Mario encyclopedia

18-Volt is a major human character in the WarioWare series. He is a great friend of 9-Volt and shares his love of video games. 18-Volt makes his first appearance in WarioWare: Twisted!, where he becomes a new student at Diamond City Elementary and soon befriends 9-Volt. In the original Japanese versions

Petey Piranha, MarioWiki

Mona - Super Mario Wiki, the Mario encyclopedia

Super Smash Bros. for Wii U - Super Mario Wiki, the Mario encyclopedia

Koopa Troopa - Super Mario Wiki, the Mario encyclopedia

Super Mario Brothers (WarioWare: Smooth Moves) - Super Mario Wiki, the Mario encyclopedia

Super Smash Bros. Ultimate - Wikipedia

The Super Mario Bros. Super Show! - Super Mario Wiki, the Mario encyclopedia

Kamek - Super Mario Wiki, the Mario encyclopedia

18-Volt, WarioWiki

Fire Mario, MarioWiki

Super Mario Wiki on X: 18-Volt's age in the WarioWare series is left vague - except the French dub of WarioWare Gold, where he states himself to be 9-years old. /