"What you need is a Vulcan!"
— Vulcan, after his arrival.
Full Name Vulcan
First Appearance (Alisa's Adventures in Rockoland) Enter the Vulcan!
First Appearance (Barney and the Rocko Squad) The Best of Barney in Rockoland
First Appearance (Xianghua in Rockoland) Why Are You Sleeping?!
Alisa's Adventures in Rockoland Portrayer LeVar Burton
Barney and the Rocko Squad Portrayer LeVar Burton
Xianghua in Rockoland Portrayer LeVar Burton

Vulcan is a vulcan cannon, hence his name. He is also the 10th Rocko Squad member. His best friends are Ling Xiaoyu, Alisa Bosconovitch, and, of course, the rest of the Rocko Squad.

During Barney and the Never Land Pirates, which is the eighth Barney and the Rocko Squad episode, Vulcan's entrance line wakes all of the girls up, which is very unusual, as a Rocko Squad member usually doesn't wake anyone up with their entrance line.

Like Evil-Man, Shrek, Charleston, Orbit, Ling Xiaoyu, Alisa Bosconovitch, and Crash Gordon, Vulcan only has one voice actor in the entire Rocko franchise, and his voice actor is the host of Reading Rainbow - LeVar Burton.