That was someone’s insane interpretation of the ending of the first Mother game (a.k.a. Earthbound Beginnings). It’s not as out there as the guy who filled the Silent Hill wiki with claims that it was all symbolism for circumcision trauma (yes, really), but it’s still kinda nutters.
If you want to bypass grinding entirely then you’d need something like that, but it might trivialize certain parts of the game. Won’t trivialize all of it though since several of the key fights rely on strategy.