I forgot I have the G&W title "CHEF" on Cooking Guide. That might be my oldest Nintendo game.

Tetris and Super Mario Land on the Game Boy. The only NES game I have left is Mega Man 4 since I mistakenly bought it thinking it would play on my PAL console not realising it was an American cartridge. I don't have the NES games I used to have since my NES broke, I just sold them. This was like fifteen years ago or more.

Computer Othello. I think...

Wait, these are games YOU yourself owned. Well in that case mine's... Super Mario Land 2.

Wee.

That is awesome. And you have Pitfall!

EDIT: HOLY CRAP. You have Q-Bert, too!

My oldest legal Nintendo game is Mario's Tennis for Virtual Boy. (Yeah, I like the Virtual Boy. Wanna fight about it?)

If you count pirated games, I own SMB on a Famicom multicart and on an NES emulator.

I was going to say Gyromite -- my parents got me the big NES bundle when it came out, with ROB (sadly gone now) and all.

But then i was reminded of the Colecovsion! I have a few Ninty games on there, DK and DKJr of course. I also have the awful-yet-loved-by-me-for-nostalgia DK for the Atari 2600.

@Adamant: Nice looking system! How are your controllers? My originals are very finicky, and replacements i've bought tend to be the same. One of these days i'll consider springing for some "professionally refurbished" controllers. I'd do it myself, but everytime i've monkeyed with cleaning the insides of a controller, i invariably screw something up.

Mario Kart 64
If VC counts then it's Super Mario Bros.

Nope, don't wanna fight about it. I hear Wario Land on Virtual Boy is a good game.

Among others. Good games for VB:
-Wario Land
-Red Alarm
-Jack Bros.
-A lot more, but I don't wanna go off-topic.

Tetris and one of the original GBs bought at the same time. :3

Metroid, though I only own it as a bonus with Zero Mission.
If you include VC, its King's Knight, a horrible game.
Otherwise, its probably Super Mario World or some older SNES game.

Duck Hunt, i guess.....