Get your button mashing on! The less people you have the easier it can be. I just got it done with 5 people playing and they gradually dropped out as they got eliminated. You can come back as another wrestler if your first one gets thrown out and you can do it either in a ranked or unranked match
This is the most annoying out of all the achievements. The problem is70% of the people playing are using turbo controllers. Its best to play with someone you know. Invite them to your game & hurry & close the room, That way only the both of you can run it & win.