All I can really say about this one, is that timing is ESSENTIAL. When you do it during the day will have an impact on if you're successful or not.
Now here goes:
Since the far superior Mortal Kombat (2011) was released back in April 2011, the majority (notice I say MAJORITY, not all) of the disgustingly good players are gone. However, the game is far from dead. Everytime I went online, there were at least 20-30 people in the chat rooms/lobbies.
But next to nobody in Ranked Matches.
If you have two copies of the game, you've got it locked down. If you're doing it with a friend, it may require a little more coordination, but it's still very doable. From what I gather, there's a very specific timing window that if you search after the other console/buddy searches (I estimated 3 seconds), you'll always match up. However, I couldn't get the timing on it.
When you DO match up however, have whoever is losing just back out with the B button. It saves time and DOES count as a win.
Remember you can keep track of your progress under the USER STATISTICS in the online menu. Once you finish a game (I played the 25th, I didn't do the quit-out, just for fun.) when your BEST STREAK under RANKED MATCH hits 25, it should pop when you get back to the menu.
If only it were that easy though. There are still people that play this game, though they all kind of suck. If you've done the Kombo Challenge(s), you may have learned some kombos that will prove useful online, and believe me when I say these can decimate your opponent. But be warned of quitters.
If it says "Your opponent has left the match," that's good. That means he quit and you get a win for that. But if it says "The connection to this game session has been lost," you might want to get your f-bombs ready, as that resets your streak, since a disconnection counts as neither a win nor a loss... and throws everything off.
As I stated up front, when during the day you do this is vital to success. I live in Central Canada and did this with two boxes at about 10am on a weekday. Only a few times did I get matched up with people (and they seemed to all be from the Netherlands), and they all sucked. Except one guy who I did squeak by on.
*Oh, and submitting negative feedback doesn't help. You'll get matched up with that dick-sponge if you submit feedback or not.*