Spoiler: More on Team-ups
Show
You make a solid point. The Library pairing went too smoothly to stick into the memory, though I think that was in part because both of them were so firmly focused on the prize: any knowledge on Della is a dominating motivation for both of them. In a more general adventure, I do think Dewey would be more interested in proving himself, resulting in friction between the two. It may well be that Dewey has grown from his experiences in the pilot, but I doubt he overcame the flaw entirely in one episode, if only because he'd remain the only one to grow all that much since.
Spoiler: The Mummy and Mark
Show
I don't mean to suggest the Mummy was a great or even good episode, and especially not a meaningful one. It was weak filler cynically placed right before Halloween, nothing more.
I do think it's better than the Infernal Internship, however. The conflicts were more enjoyable, the interactions were more enjoyable, and the resolutions were more enjoyable. The Silicon Valley parody aspect would have worked better if they hadn't played it so straight - it would have been far more amusing if they'd mixed it with more Willy Wonka, but the "fun-gineering" aspect is too spot-on to the cliche they were parodying, and it's ultimately spoiled by the fact that Mark is knowingly conning everyone in order to get rich. If they'd better shown that he was otherwise successful in his own right and this is just a ploy to break the golden ceiling, it wouldn't bother me, but the actual outcome would be the equivalent of discovering that Willy Wonka was secretly running a massive franchise of dentist offices and embezzling millions from diabetes charities. Huey and Louie don't have any fun interactions (Huey's breakdown isn't even all that interesting, he needs to take lessons from Donald on how to throw an entertaining fit), Mark undersells the danger of the episode at each turn before revealing that that, too, was all a sham, and the Scrooge/Glomgold alliance was mired in preamble without ever getting to anything meaningful-slash-entertaining.
The Mummy, on the other hand, is like a bag of candy: an ephemeral pile of empty calories that don't add anything meaningful but still provides some pleasant diversion for a time. Watching Scrooge's heroic speeches get upstaged by a half-eaten burrito was good. Having Webby accurately and honestly correct the guard on the finer points of ritual sacrifice (because, if she had to be sacrificed, she'd rather it done right) was great. Having earnest Webby contrasting with con-artist Louie was amusing. Having the mummy actually manifest all the insane mythic abilities its followers ascribed to it was funny. Having it all turn out to be a scam then twist into a realized prophecy resolved (once again) by Launchpad's burrito fixation was entertaining. Having them do Thriller without actually calling it out was... nostalgic and clever. Having the final punchline be Scrooge admitting that, despite dropping nine grand on Mexican food and all the danger involved in the adventure, the burrito he got out of it (that he paid for) was actually not bad at all was satisfying if kinda weird. None of it was high art like the initial few episodes, but I didn't regret seeing it at all.
There are episodes of this show that I will happily watch multiple times if the mood takes me, like the Daytrip of Doom! or even The House of the Lucky Gander!. Mummy didn't annoy me, but I probably won't waste space on my DVR to keep it, or even remember it all that much besides a few choice moments. The Infernal Internship, however? I actively disliked that one and am hard-pressed to find something about it that was actually entertaining.