I don't know how many people have beaten MK2. Anyway, there are good MK2 players that post their videos on google videos. So look for this, if you'd like to see usefull technics against the cpu. Hope this helped you.

I have. looots of times.
As a matter of fact, i've beated all the 2d MK's (less MK mythologies Sub Zero), and MK 4.

Yeah, on most polls MK2 takes the cake for most difficult out of every MK ever made.

Out of the fighters.

Out of the MK adventure games, MK:M Sub-Zero is the hardest but it's easy once you get the hang of it. Some people say it's too hard but I like the challenge personally. It's fun.
I beat that game once in 4 hours straight up, not easy but fun and exciting.

But yeah subman, MK2 is no doubt the toughest MK out of the fighting games and one of the hardest fighters ever made.

congrats on beating it.

I beleive my brother and I beat it years ago on the Genesis.

the SNES ones had easier difficulty (seemed like it), so I beat it.