>>55875767Raticate, Raichu, Sandslash, Rapidash, Mr. Mime, Corsola, Stunfisk, Electrode, Qwilfish, Braviary, and Decidueye have always been shit in both forms.
Ninetales, Muk, Farfetch'd, Weezing, Typhlosion, Samurott, Lilligant, Basculin, and Goodra were always shit in their original forms and only the regionals have ever allowed them to be decent or good.
Dugtrio, Slowbro, Zapdos, Runerigus, Avalugg, and Tentacruel are all worse as regionals than in their original forms.
Slowking, Moltres, Sneasler, and Quagsire are all sidegrades to their originals with both forms remaining viable.
Articuno, Persian, Tauros, Exeggutor, Golem, and Marowak have all actually been powercrept, but they've been dogshit since gen 3 and would be shit regardless of getting a regional 15 years later or not. Also only Marowak's regional is actually any good.
Only Linoone, Darmanitan, Arcanine, and Zoroark could actually be argued as having actually been "replaced" by their regionals.