Everyone talks about how Flying Pokémon took a casualty during the transition to 3D, but less discussed are all the fish Pokémon that are also just sort of awkwardly suspended in the air. Even nowadays, when several land-dwelling 'mons have separate animations for swimming vs. being on land, why isn't the opposite as common?
I mean, I get it, it'd be unbefitting for most of them to just be flopping around while on land like Magikarp, and for some 'mons like Mantine, Jellicent and Veluza, it actually makes sense for them to be floating. But many of them have fins that could support them on land, like what Tatsugiri does, I think that'd be interesting.
I think by far the worst example is Chinchou, its anal fins literally look like little feet, what would be the issue with having it stand up on its "feet" while on land?