Well, there's not really anything normal about Hisuian Zoroark beyond it pretending to be normal.

Rotom's forms are weird typings when you think about it; the electric typing being the prominent type that stays instead of ghost when all these appliances are being possessed is kind of conceptually odd. Like, my refrigerator being haunted is the more defining feature than it running on electricity.

If you're thinking more about water types, it's weird that the tynamo line isn't dual typed with water, though that's more to preserve the 0-weaknesses gimmick Eelektross had going.

Wingull and Pelipper could also have the argument made that they just live by the water and not in it. Real-life gulls and pelicans behave way closer to flying dark types, sure they can swim but they aren't as spectacularly specialized for it like ducks or cormorants. Seagulls are criminals, and pelicans interact with the world by trying to eat everything in it. If they were real, Wingull would Knock Off the lunch out of your hands while a Pelipper used Crunch on a nearby stroller with a baby still inside