Temtem[0] comes to mind. Remove power points per move, add stamina costs and reserve per pokemon; remove RNG (crits, random secondary effects); change up the type advantages, remove types, add types. The story even has a competent and reasonably threatening adversarial group! I haven't beat the main story but it's seems promising so far. It is otherwise remarkably similar to a main series pokemon games, in particular the metroidvania-like "movement ability gating", e.g., a surfboard for traveling on water.
But if one prefers Palworld to Pokemon, I'd suspect they'd also prefer Palworld to Temtem; the game play in Temtem is much more similar to main series Pokemon.
0: https://store.steampowered.com/app/745920/Temtem/ (I thought they had their own website but I think it's just a wiki now.)
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Compared to the calcified mechanics of a mainline Pokémon game, playing Palworld and enslaving a horde of adorable sheep to make assault rifles feels like a rush of freedom.
I'm a long time enormous fan of Nintendo, but it is a fair criticism that at times they can be overly conservative, and seemingly biased toward creating a very similar experience to a new generation of children rather than a new experience to existing, aging fans.
I don't much blame Nintendo for this though because it's a pretty reasonable decision. If I loved Pokemon when I was a kid, it's quite likely that a kid of this new generation that has never seen Pokemon before is also going to like it. Why not serve that new generation with a proven product?
The good thing for indie game developers here is that this opens up a gap to iterate on Nintendo's ideas for an older more seasoned audience that may be tiring of the same old.
There's huge opportunity here. We're now seeing a good example of the potential with Palworld, but before that we saw it with Stardew Valley, which brought iterative innovation into the space occupied by the overly conservative Harvest Moon/Story of Seasons games.
Now Palworld itself may be fairly criticized for hemming too close to some of Nintendo's visual style here, but in general I think what they're getting at in terms of providing something new to Nintendo fans is totally fair and something that I'd love to see more indies do. There are quite a few neglected Nintendo franchises out there.
Another one that long time older players are quite dissatisfied with is Animal Crossing. We've seen a few indies try their hand at Animal Crossing clones, but none have hit the mark yet.