muppetbigwig: First of all, Welcome! Second, I honestly don't know if Gorgon Heap is the same monster from the inchworm skit. Third, Lenny the Lizard definately has some kind of big differences from the old Kermit from Sam and Friends, though I couldn't give you specifics off the top of my head.
abiraniriba: Pachalafaka? I haven't the faintest idea.
muppetmonster: About Bert's possible TMS counterpart. I don't think Marvin Suggs is Bert's counterpart at all. Yes, they are- er, were? Both voiced by Frank Oz. But that's not a lot to base off of, considering Ernie was voiced by Jim Henson and Lew Zealand was voiced by Jerry Nelson. Besides that, Marvin Suggs had quite the sadistic streak. His greatest pleasure seems to be making music by hitting the muppaphones. Sounds a little... I don't want to say "evil," but it doesn't exactly sound like a nice thing to do. Bert, on the other hand, has his peculiar interests, but none of them include bringing harm to any other person or thing. He's probably more like Sam with his seriousness, but Bert isn't really anywhere near as rigid as Sam. I mean, he likes to have fun, too, whereas Sam... um... yeah, he's Sam.