Head-Cannon that once more, Mabel gives dipper another twin souls book. Dipper, having enough of the forsaken books, goes to destroy it. not normal incinerate and be done with it, just completely wipe this one particular copy from existence. So he pumps it full of demonic energy, because its a book it candle handle any amirite? Plan backfires horribly, and now there’s an indestructible copy of twin souls, that floats around, and exists as long as dipper does.

The TS book is named Twinny and likes to sing passages from the book to him

Does Alcor ever find a Bill reincarnation that he can hate on? Are there any that are even mildly aggravating, evil, or obnoxious, or is Alcor forever doomed to irresistibly ordinary Bills?

Dipper has disliked or been annoyed by r!Bills several times. The first r!Bill ever he smashed against a wall.

Many of them are obnoxious and many of them aggravate him, and none of them are exactly ordinary, though they may be human and mundane.

But if that’s not what you’re looking for, and you’re wondering whether there have been absolutely despicable r!Bills around, indeed there have been. Bill’s soul has reincarnated as cultists, criminals, and just plain horrible people that Dipper feels no shame in hating or being cruel to. But that doesn’t make it different from almost any other soul; morality is not passed down through reincarnations.

Gideon, in TAU fics, tends to be portrayed as his selfish obnoxious possessive jerk, but there was a redemption arc going on so…weird “uncle” Gideon!!! Gideon, who’s still a bit creepy with Mabel but he’s learning. Gideon, who envies Henry but absolutely ADORES the triplets. Gideon, who’s scared af of Alcor but at the same time he’s kinda interested in the fact that Dipper became a demon. Gideon, a tv Supernatural preacher who ends up doing anti Pro-Nat propaganda.

Bonus points if he stays friends with the prison thugs and the children have slightly unnerving bodyguards on the playground. Dipper points out that they don’t really need it with him on watch but Gideon insists.

HC that every summer Mabel and Dipper make the trip to Florida to have a holiday with Mermando and his family. After Dipper gets the hang of his powers, he makes deals to let the mer-manatee family on land, or Mabel under the water.

Would that make them Merbel and Humando?

But yes Mabel and Mermando going on adventures together, Mabel getting used to fins and Mermando getting used to legs for short intervals, yes pls

Mabel even (eventually) becomes friends with Mermando’s manatee bride! (It takes some doing) (She’s a bit jealous at first because his bride is so radiant but once she meets Henry that goes away)

(and then)

(double dates)

would enoby, as they got older, stop liking twin souls and get into mizar the magnificent instead?

Enoby’s love for Twin Souls never dies. Never. There’s always more content that comes out for the franchise, which has been rebooted dozens of times before their lifetime and will remain legendary for long after. They have no lack of TS material to consume and they never, ever get sick of it. They probably become a scholar of the Alcorian Myth Cycle when they’re older much like Philip Farkas, actually. And even though that part of them that incessantly keeps summoning Alcor and trying to trick him into dating them eventually dies down (in like their twenties) they always will harbor a crush on him.

Mizar the Magnificent is probably an absolutely ancient cartoon by the time they’re alive, so they probably would have to seek it out if they wanted to learn about watch it. And any media that only centers around Mizar  their rival for Alcor’s love they wouldn’t be too fond of. Maybe they’d check it out for any Alcor cameos, but they have Twin Souls High, the ever-popular highschool version of TS, for that, too.