I've two:
In the AU fic series "cut and run" I make the Team Rocket Trio attempt to steal Pikachu as a running gag even though Ash isn't the focus of the story until very late in.
Ash wryly treats the abduction attempt as just another day (Sorry I was late, ran into them again" sort of reaction), and it gets more and more ridiculous as it goes on. First round he's not even present, they plow in on Prof Oak's and Oak handles it in the back story. Second round they get blasted off taking a chunk of the roof on their way out and their impact site becomes a directional landmark for those poking around a section of Oak's reserve. In the near end story, while reviewing footage of the various League challenges, Giovanni and Oak get a viewing of the many many failed heists that occur in the plot via various security cameras and both decide to act un-adult and go drinking after, to cope with the sheer amount of stupid they had to watch. Oak later picks the topic up as a means to needle the retired head of team rocket. I wind the string of JJandM incidents down with a classic pit trap that turns into disaster dominoes ending with Gio, their Boss, at the bottom of the pit with Ash and Pika. The Rocket trio, oblivious, boast how they've got the brat and his rat now and they're getting promoted, surely, while Gio listens on in a mix of utter disbelief and disgust, because it's been that type of day for the man, and he's just done.
In another story Transversal, I have the idea that the Legends are not perfect, or horribly competent, and were rushed in making an alternate universe for the cast to transverse. It's slapdash at best, based off of how they assume humans work, and since they don't have a clue it becomes a joke in the Giovanni chapters for him to pick at small, petty things as he's left the "real world" to be thrust into a palce that runs on video game logic. His present obsession is fences. Legends do not grasp property lines, or where fences really go, so he's walking along fields in the middle of a road that separates two town in Alola and bitterly commenting on how fences do not go there, that the ones in town are supposed to have gates (and there's people trapped in their bonds becasue of it), and that they should NOT open up to allow someone walking besides them to fall over cliffs to rocky beaches below...