>>50628314The only people who say this are people who have no idea what theyre talking about.
The majority of Mega's were NOT previously good Pokemon. In fact, let's go through the list.
>Charizard: Literally meme'd about for years due to how badly SR neutered it>Venusaur: Good, though relevancy varies, and lost a lot due to weather wars dying>Blastoise: Bad>Beedrill: Bottom tier trash>Pidgeot: Bottom tier trash>Alakazam: Good>Slowbro: Good>Gengar: Good>Kangaskhan: Bad>Gyarados: Good>Aerodactyl: Mediocre>Mewtwo: Uber>Ampharos: Shit>Steelix: Shit>Scizor: Good>Heracross: Mediocre>Houndoom: Mediocre>Tyranitar: Good>Sceptile: Shit>Blaziken: Good>Swampert: Mediocre>Gardevoir: Bad>Sableye: A very slim niche otherwise bad>Mawile: Bottom tier trash>Aggron: Bad>Medicham: Bad>Manectric: Bad>Sharpedo: Mediocre>Camerupt: Bad>Altaria: Bad>Banette: Bad>Absol: Bad>Glalie: Bad>Salamence: Previously good but slipping>Metagross: Previously good, now mediocre>Latios: Good>Latias: Good>Rayquaza: Ubers so who cares>Lopunny: Bad>Garchomp: Good>Lucario: Previously good, now mediocre>Abomasnow: Small niche, otherwise shit>Gallade: Bad>Audino: Bottom tier trash>Diance: BadOut of all of these, only 15 were previously good, and that's being generous and counting those like Lucario who were falling off heavily.
The other 30 were mediocre to bad, and not cut out for standard OU play minus some rare niches.
The only reason you think otherwise is because Mega's did their job and increased the viability of almost all of these pokemon