Even Silver and Gold wouldn't have worked without Iwata fixing Game Freak's mountain of spaghetti code, and that's before he managed to fit Kanto into the cart.
Pretty much, the jump from Yellow to Gold and Silver was groundbreaking given that we got from the day and night cycle, breeding, time travel trading, actual colour, list goes on.
Even Silver and Gold wouldn't have worked without Iwata fixing Game Freak's mountain of spaghetti code, and that's before he managed to fit Kanto into the cart.
Pretty much, the jump from Yellow to Gold and Silver was groundbreaking given that we got from the day and night cycle, breeding, time travel trading, actual colour, list goes on.