For one thing fetishes often come from stupid cartoon shit or tropes. The cartoon shit isn’t meant to be fetishy but people find it hot for whatever reason and a fetish community then develops around it. Take for example the visual gag of someone getting smashed flat by a heavy object -> weirdos get obsessed with the idea. Violet Beauregard turning into a blueberry wasn’t fanservice for the “blueberrification” audience, that “audience” was created by weirdos after the fact. Totally Spies is admittedly French but I don’t believe it’s meant to be a fetish’s buffet specifically. Three hot chicks dealing with cartoony, non-lethal threats is just going to get into fetish territory no matter what. People will get a fetish for ANYTHING no matter what you do. So no having a fat guy isn’t necessarily proof of fetish bait.
There’s a pretty clear difference between stuff that is intended legitimately, and “low key” fap material that is made by fetishist for fetish reasons. (It’s not low key at all, but it’s something a normie wouldn’t assume is sexual.) The key is in the focus.
This cartoon is supposed to be styled after PaSwG/dexter’s lab type stuff, yet there is an inordinate amount of attention and detail put on green dog’s gut, the fat folds, shit like *growl gurgle* being written out, the interior wall of the stomach being weirdly detailed and realistic. Everything else is secondary to the fetish he is showcasing, which makes it porn and therefore inappropriate. In other words he knows it’s a sexual thing and that is in fact his motivation.
He couldn’t hold back from finding a way to shove his stupid horny bullshit into his “kids show” which says he has no restraint. He doesn’t seem to instinctively know his garbage tier fetishes maybe shouldn’t be front and center 100% of the time either, which is a bad sign.