Yes I remember that Muppet Babies episode, I have it on a tape actually.
Muppet Babies was a great show, I mean for a show that sends kids messages it really was quite terrific while being entertaining (and I mean entertaining entertaining, not tiddlywinks and sock puppet entertaining for an education show). Ahh, such fond memories. And looking from a completely GB point of view, it had a shot from the movie right in it's theme song (Ray shooting Slimer for those who don't remember). There were plenty of episodes were Ghostbusters crept in. The Bugbusters ep. was one of my favourite, and to this day I say the ‘bugbusters’ song sung by baby Gonzo is one of the best GB song spinoffs/remixes (though perhaps it would be better if it was sung by someone other than Gonzo).
Some of my other favourites are (I don't actually know the episode titles)
-the construction of the railroad (a toy railroad with two teams starting at opposite ends of the house)
-the video game battles (Gonzo and Miss Piggy compete in a game that's strangely a lot like Legend of Zelda, while the rest of the kids want cracks at games that involve that running mat, and a Donkey Kong type game)
-Little Red Riding Pig (I'm actually pretty sure of this title, the babies put on a show of little red riding hood, but everyone twists it around, the best being that it ultimately takes place in the Star Wars universe and Miss Piggy flies in an X-Wing to places like Dagobah… with Animal playing Yoda).