Super Mario Bros 3. Just compare the first 2 (well, the first 2 that came out in Japan, meaning 1 and The Lost Levels. Though even if we include the Doki Doki Panic spinoff SMB2, it still holds true) with what the 3rd one brought to the table. Super Mario wolrd expended further on this, but didn't revolutionize like 3 did.
Then, there's SSB Melee. It improves the original vastly in every which way and then some.
Finally, Mario Kart: Double Dash. Vastly more drivers, more items, and especially some grand battle modes
Oh, and did you notice that Nintendo manages to pull this off with 3rd party IPs too? Hyrule Warriors is among the very best Mosou games, and the Raving Rabbits where dead and buried in Rabbits Land until Mario & Rabbits came along.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/
