Correction:Gen 1 and maybe gen 2 are really beloved.The rest is just grouped together.Just go out and see what are the usual pokemons that are used for marketing:Pikachu, Charizard, Eevee, Squirtle.And so on.Not only that, but only the mainline pokemon games sell well(and their remakes, which are based on mainline games).Most mario games, spin off or not, sell well.You get where I am going with this.
But Ill admit that pokemon is an oddity in the sense on how well it has survived without basically doing anything new.Its probably nostalgia mixed with the pleasure of capturing creatures, which Pokemon basically pioneered.And thats what makes me so sad that its stuck in the past.
Is Zelda not the same? Before BoTW, OOT was the beloved game, and the others were bunched together. The Pokémon spinoffs sell pretty well, do they not?