I remember that guide from when it began and yet I am surprised that it's his first appearance as a regular. Somehow I thought he'd have been seen a bit more before that. And it's season 20 after 1988 had ended (perhaps he was busy doing his scenes from UHF). But I figured it out when I looked at the guide and apparently Gina introduced him as "an art student", which I don't remember being mentioned in the guide before (I should look at past edits), and I guess no mention of the fact that he had been Bob's penpal and visited before? I guess I overlooked the fact that there hadn't been an episode involving Hiroshi moving to the area from Japan, I think his first appearance was just meant as a visit and not a full move to New York. Was he just using the garage as an art studio, or was it meant to also be his home (and wouldn't he have been living somewhere near the street by this point anyway)?
Meanwhile, here's a guide for a game show parody, with parodies of Pat Sajax and Vanna White:
https://muppet.fandom.com/wiki/Episode_2428
This came just a season after Squeal of Fortune, and they came up with new parodies of those people, instead of using the characters from Squeal of Fortune? I guess Jim Henson wasn't available to perform the host, but that didn't stop Captain Vegetable from being in street scenes. And Matt Playback looks so similar to Pat Playjackss, only his teeth look bigger and I think his hair looks shorter. The scenes with Maria feel more like Sonny Friendly scenes.
Honestly, who from the late 80s and early 90s stuck around in the long run? Hiroshi? Petey? Mike? Lillian? Mr. Handford seems to be one of the only exceptions to a certain degree.
Gina remained for a good, long run. And to an extent, Uncle Wally stayed for a good amount of time, even if it seems somewhat small by comparison (actually, he might have been on the show for as long as Mr. Handford).