Wingulls should be commonplace in areas close to the sea, I like the concept of Jellyfish being ghost type but too much is too much still. With that many jellyfish, their predators would be quite having a good time. Alomomola should be quite common. Sunfishes in real life eat jellyfish.
Alomomola's range will be increased in response to Frillish population.
Wingull and Pellipers will restricted to oceanic areas but can be made available in Surfing.
Lillipup's family ranges will be significantly decreased
Basculin I am still looking into it.
Ducklett's range will be made a lot wider extending their reach in fresh water areas. You can also encounter Swannas too
Spheals or Seels will be encountered sometimes but I am still looking at how to distribute them as Nature would do so.
Deerling's ranges will be increased.
Joltik's range will be extended out of Chargestone Cave to reflect Durant populations.
Heatmor's range will be extended slightly
Lostlorn and Pinwheel Forest will have
Bird Pokemon like Rufflet, Chatot, Pidgey, Swellow.
bug types like Weedle, Caterpie, Combee, Burmy.......
Durant will be made as common as lillipups. We still contend their real life relatives today, not sure why is Durant not that commonplace given the amount of ants we encounter in our lifetime.