Space Knights

The Arthurian Mythos !! With Spitting Image-style rubber puppets! And pirates!

Seriously, though, this very odd New Zealand series from 1989 is one of the stranger things to come out of the Southern Hemisphere, being a co-production between TVNZ and Channel Seven. Basically, it's a series of self-contained episodes, usually featuring a bunch of teme-named derivatives of the Arthurian characters (and their Robot Buddy Conrod) battling against three idiotic pirates and their evil boss, Mordread Darkvoid.

It does not appear to have been officially released on any medium other than VHS tape, but can be found on YouTube.