I just stumbled onto a retro-themed flash cartoon, “The Velvet Mouse Show”.
This show brings to mind many old Hanna-Barbera cartoons, particularly Scooby Doo. It features a couple hippie dudes, a young wizard from medieval europe, a space guy (brings to mind Spock), a talking mouse, and the requisite token girl character. The guys all form a band & go around solving mysteries.
The show is available for free viewing on it’s website: http://www.velvetmouse.com/