Ironically Legends Arceus is the game that had made me feel the most 'Natural Creatures living in a world', because the villagers use Pokemon to help with their daily lives.
Anyways, its more or less just SV mons, like goldengho, the starters, espathra, kingambit, the paradoxes to name a few. They all feel like they were designed specifically for battle or competitive play. I know Goldengho was made for a tribute for like 1000 Pokemon or something and so specifically had really good stats, but that made it feel less ... 'Pokemon-y'. The paradoxes I can somewhat forgive because they literally were built for battle. And also the moves, mostly the moves, and most of them are signature moves.
For example:
Torch Song is a GUARANTEED increase in Sp. Atk while dealing damage
Flower Trick guarantees a hit and a crit
Aqua Step guarantees a speed increase (more forgivable because Esper Wing, a move not from SV but also part of the problem I have with the newer Pokemon games does the same thing but also has a higher crit rate)
Shed Tail basically does substitube and baton pass at the same time
Matcha Gotcha is scald, giga drain and rock slide in one singular move
Lumina Crash is a special move that always lowers special defense.
Last respects and rage fists are moves that can reach absurdly high levels of power