Let's break it down...

[finisher]

Now here's an example of a really big resource rip-theft ripfest game:http://youtube.com/watch?v=T4AU1qZUdRM.

Let's try to find out what this game stole out of:
-The majority of it (player, alien and enemy runners, prone sniper, grenadier, weird vomitting christmas tree, slugs, life medals, gun bullets, sounds, more) come from Super Contra.
-The first level is a rip from Mighty Final Fight, but a bit modified to be long.
-The second level boss is apparently from Shadow of the Beast?
-The final level's boss is a clear-cut variant of NES Contra's Waterfall boss. This is a different color, has no arms, giant fire rings out of the mouth and slugs out of the ears. In other words, less dynamic.

[dcescott]

You can get this and others on Ebay, usually from an overseas seller. It's a pirate game, but it looks fun, although not as original as the real thing. There's a pirate mario, tmnt, even sonic on the NES all sorts of things. I think there's a Killer Instinct too, obviously a rip off of something elase already made for the NES, but hey.... I'd still play it to say I have it on the NES!
I found a couple Gyromites with the 60 to 72pin adapter inside. I have a dedicated 84 in 1 and I'm waiting to find the right famicom only game to use the other:)

[MrSparkle]

I saw an awesome bootleg mario game on ebay for nes a few months ago. Super mario world, it looked like they were using the engine from marios time machine to pull it off possibly though it could have just been cloned either way it looked pretty damned close to the real thing minus a few colors.