Seems someone has discovered that the Mario 2 released for the NES was infact stolen!
It was an exact ripoff of a game called Doki Doki Panic.
to see what I'm talking about.
Now if you don't want to hear the guy bash Mario 2, and straight to what I am talking about.
Then skip right to 6mins and 30secs into the video.
You will then see the truth about Mario Bro's 2.