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Pokemon Prism has a few dumb dialogues here and there, if you can endure that, the gameplay-wise it's pretty god tier.
It has many regions, 20 gyms/badges, you can customize your trainer a bit, it has some pretty interesting gimmicks, despite being a gen 2 hack it has many Pokemon above gen 2, new moves, special/physical split, abilities and more.
Overall, it feels like the definitive singleplayer pokemon experience (or at least, it would be if the story was better). Still worth tho.