Mario on NES

Super Mario World

Super Mario 64

Donkey Kong Country 1-3

Zelda Link to the Past

Zelda Ocarina of Time

Chrono Trigger

Secret of Mana

Final Fantasy 6 (or 3 for North America release, depends how ROM is labeled)

Luigi Mansion

I'm biased towards Nintendo but I think all of these games have held up just fine. Maybe original Mario is a bit stupid to kids these days though but the Super Nintendo one is better.