Saironi said:
You can't really be sure. There were other Frackles in the special that didn't appear on The Muppet Show. And Gonzo went from a Frackle to a Whatever, so maybe Lenny was the "Lizard" Frackle, but was in the background where we couldn't see him.
It's been awhile since i last watched the Florence henderson episode with the Muppet Morsels on, but I beleive that the morsels state that Lenny the Lizard evolved from the Snake Frackle, not the one that we've recently been calling Snake Frackle (though before the DVD release, we've been calling him Green Hunchback Frackle). The morsels could have been refferring to the wrong character.
While there have been frackles who didn't appear in The Great Santa Clause Switch, I don't think there were any frackles created before that, or at least they weren't called Frackles untill then (some Snerfs appear as frackles, and according to Muppet Wiki, the original monster puppet that evolved into Cookie Monster was slightly modified as The Alarm Frackle in that special).
When the transcript and pictures were first shown at Tough Pigs, I thought I saw a green snake-like frackle who looked like Lenny the Lizard in that special, but when I looked at that site last december, I couldn't find the picture with a snake-like Lenny, but did see a picture of what looked like the purple frackle from You've Got a Friend.