If we're talking about true launch titles, Super Mario Bros. came out in 1985 while the Famicom was released in 1983. My vote would have to go with Super Mario 64 though, that's one of my favourites.
Nintendo definitely has the plurality of great launch titles.
Until last year I would have said Super Mario 64. Now I’d say BotW. In my opinion it’s the best game ever made.
Hmm, my favourite launch title ever? TimeSplitters isn't really a launch title as it wasn't available for the Japanese release; however if you count it, that'd be my choice. However if we're talking about games that launched with the original launch of a console, mine would be probably be Super Mario 64, but I also enjoyed Tekken Tag Tournament a lot.