What art style are you referring to?
They have a very simplistic style to them make the mix-and-match "work"/easy to do; they almost look like they're made from solid plastic. Like they look like something I'd find in those cheap bin of plastic dinosaurs toys. If you compare them to past Fossil Pokemon they look more detailed in body shape and less vibrantly colored (not saying some weren't brightly colored, but the colors they had felt purposely picked to blend with the design and make you think this was an actual creature).
And, uh, I think the biggest loss regarding the Galar fossils is that we're unlikely to ever get the full fossils for each of the halves.
Which is an odd thing because with the other Fossils we've gotten complete Pokemon with only a small piece of them. Omanyte, Kabuto & Tirtouga from their shell, Lileep from its flower bud, Anorith from its claw, Crandidos & Shieldon from their cranium, Archen from its feather, Tyrunt from its jaw, and Amaura from its eyelid. Aerodactyl is possibly even more extreme as the original implication is that it's revived from blood that was drunk by a mosquito which got caught in tree resin; though nowadays they'd probably say it was tree resin that Aerodactyl liked to eat and thus most Old Ambers likely contain Aerodactyl genetics.
Yet it seems like these fossils can ONLY be revived when combined. I always wondered why there aren't a slew of Fossil Pokemon, was the ancient Pokemon World only filled with these handful of Fossils. But now I'm wondering if the case isn't that these were the only Fossil Pokemon but these were the only Fossil Pokemon able to be revived. There are probably hundreds if not thousands of prehistoric Pokemon, but just something about them makes them un-revivable (maybe has to do with all Fossils before now being Rock-type, maybe they were Rock-types before becoming Fossils thus able to be revived from rocks rather then being Rock-type because their DNA was mixed with rocks!). And maybe originally the Galar Fossils were this, unable to be be revived because they're not Rock-types thus too much of their genetic material decomposed except for the parts of them that become fossilized (and we'll just pretend all species fossilize the same way, or at least for those that can be revived). However, just like how the in Jurassic Park they used frogs to replace any missing DNA, there was enough genetic material in certain parts that when combined together let them be revived... with horrific results.
Seriously, Cara Liss needs to be charged with Pokemon cruelty. Like in future games the only way I can see being able to get the Galar Fossils if they're even directly given to you as Gifts or there's a shady scientist you can speak with instead of the scientist who usually revives Fossil Pokemon that'll agree to combine the Fossils.
I look at a game like Temtem and their creature designs and I struggle to remember a single one 5 minutes later. I think this is a major reason pokemon continues to have so much success and staying power and has never really been threatened by similar games.
Well it has, but what you say about design comes into play and let's Pokemon keep going. I would use Temtems as an example as that's a fanmade game. The example I would go to would be Pokemon's old rival, Digimon, and newest rival, Yokai! Watch. Now to be fair to Digimon the "classic" Digimon are still remembered by many even today, however Digimon doesn't have a rigid monster designing rules like Pokemon does so Digimon designs are all over the place. Yokai! Watch designs meanwhile did feel like they had some designing rules and for a while in Japan they were more popular than Pokemon among kids... but then someway along the way Yokai! Watch seemed to trip up. But aside from that, I also recall Yokai! Watch having many similar designs to one another and share generally the same aesthetic. Meanwhile Pokemon range from looking cute, strong, creepy, scary, cartoony, realistic, etc..
Another TCG shoutout. The newest set is a reprint set, and this time it's doing new full arts for some of the trainers, particularly Marnie & Piers. Marnie gets out her semifinals outfit but Piers gets.....
One based on his younger self, the one you see on his rare league card! I like his linoone there too. It's always fun to see the alternate designs get some use.
It'd be cool to get a similar one for Kabu (who isn't in the set), Rose (who IS in the set) and Opal (who doesnt have a card at all yet) some day
Though I'm guessing if Rose gets a full art it'll be based on the climax, in front of the cocoon.
Well if they do special cards for each character:
Milo: Show him working with his younger brother.
Nessa: She's a model so have it be a collage of her in different clothes. Or maybe she a younger Nessa hanging with a younger Sonia when they were competing in their first Champion Cup.
Kabu: As said, show him as his young self in his rare card.
Bea: School clothes from her concept art.
Allister: Maskless.
Opal: Her young self you see in her concept art.
Gordie/Melony: Like Milo, show them with their other family members.
Raihan/Leon: Like my second suggestion with Nessa, show young Raihan & Leon from their first Champion Cup.
Which is why I wished it was its own Pokemon...