WWE 13

I did this with Randy Orton and Chris Jericho '99. I played as Randy Orton. I also made sure to use infinite finishers. All you have to do is quick irish whip Jericho over the top rope so he lands on the apron. Then make some distance so he can springboard back into the ring at you. He springboarded back in about 95% of the time.

I did this in less than a minute.

The name is - You can't let down your guard

You have to catch an opponent in mid-air with a finisher. I know you can do this with these wrestlers

1-Chris Jericho
2-Both Undertakers
3-Both Kanes
4-Randy Orton Thanks to Srl Klr for letting me know about this one.
5-CM Punk
6-Shawn Michales
7-Mark Henry
8-Big Show
Edit- To make this easier lower the difficulty.

You need to have a finisher Icon and when the opponent jumps off the top rope or does a springboard(Jumps off the ropes while still in the ring. Press Y to do your finisher.(Edit You can Spam the Y button it does not have to be pushed once)

Now there is literally a split second when you can do this so it will take practice. But you will know its possible when there character jumps and you see the Y Icon come up under there character and it says OMG or Finisher.

To help with getting this What i did is. Irish whip them in the corner (Press B and the direction of the corner to throw them)

Walk up to them and press UP on the RIGHT stick.(this should raise them to the top turnbuckle)

And wait for them to recover and jump at you. That is the fastest way I can think of to get them in the right position. I did it with Undertaker VS Rey Mysterio.

Edit- Gunrunner318 says that he got it while the computer jump at him while he was outside the ring. So you can get it inside or out...

Note- That when you are selecting your characters you can give yourself unlimited Finishers.

I hope this helps. If you need more help please let me know before down voting thank you.

The way i got this done was to use Randy Orton vs Sin Cara. I set Ortons finishers to Infinite and Cara's to none. Start the match and Irish whip Cara over the ropes. 99 per cent of the time he will springboard back into the ring attacking you. Just as he spring boards in the OMG will pop up when you hit the Y button at the correct time bang achivement unlocked. I done this today and it took a few goes to get the timing down but with the Finishers set to infinite its not a problem

Easy way to get this select easy difficultly put infinite finishers on and pick Randy Orton vs Chris Jericho 99 irish whip Jericho in to the turnbuckle press up on the right thumb stick well he is dazed back away from the turnbuckle a little bit and keep button bashing the y button. when he stands up on the turnbuckle make sure you are still button bashing the y button don't stop if he jumps you should do your finisher in mid air worked first time for me .

Another match suggestion for this is CM Punk vs. Daniel Bryan
when i did this match Bryan had a tendency of leaving the ring then when he was going to re-enter the ring he would get on the apron and jump in at me.... seems like it such a small opening to hit the Y button so if you miss it the first time be patient it will come in time.
Make sure Punk has infinite finishers as well makes it easier instead of trying to build up finishers for ths OMG moment