I'm talking about their olden day Arcade classics that eventually got ported to the NES that they made in the days before the NES. (And after the NES was released. Any early 80's Nintendo Arcade game.)
I'll start it off with what I can think of off the top of my head:
Mario Bros.
Wrecking Crew
Wild Gunman
Balloon Fight
Donkey Kong
Donkey Kong Jr.
Donkey Kong 3
Popeye
Punch-Out
Clu Clu Land
Ice Climbers
Correct me if I'm wrong.
I know I've missed some.