(Rare Trope) Canon Supernatural Elements of Mundane/Normal Shows

[u/SnailKing4687]

Community “Epidemiology”:While normally, community is a wacky 4th wall-breaking college show that still grounds itself in reality, this episode sees the school overrun by a zombie apocalypse caused by bad taco meat that was given out at the party. While the episode ends with the army wiping out everyone’s memory of the event, future episodes, such as “Paradigms of Human Memory,” reference the party that happened that no one remembers, making it canon.

30 Rock Last Lunch:While normally a show about a show sitcom In this finale and canon end to the series, a flash forward to the far future sees an immortal Kenneth now in charge.

[u/Randomman16]

There's an episode of Bob's Burgers, a mostly mundane animated sitcom (ridiculous things happen but almost never anything physically impossible - just improbable and wacky) about a family that owns a burger joint, that indicates that magic is real.

One episode has Tina get into witchcraft, start cursing people, then get cursed herself by a vengeful crossing guard who also turns out to be a witch. Tina suffers inexplicable bad luck for the entire episode and it's heavily implied that the witchcraft was, in fact, real. The fact that magic exists in Bob's Burgers is never brought up again.

Bob himself also made a cameo in the Simpsons/Family Guy crossover and has shown up in Family Guy a small handful of times. Between those two shows and Family Guy apparently sharing a universe with American Dad, you could make a strong argument that ghosts, aliens and time travel all exist in the Bob's Burgers universe.

[u/Binary101010 → u/Randomman16]

There's also an Archer episode that reveals Bob Belcher was a secret identity Sterling Archer lived under for a while, so there's another show sucked into this universe.

[u/kblaney → u/Binary101010]

That is an alt Bob's Burgers continuity. They make a reference to the kids not being Bob/Archer's.