It's a great game! It has little blood. The only bad stuff is they might show you or your opponents eyes swollen or you might have a bloody nose or maybe a few cuts, nothing a 10 year old couldn't handle. The sex rating is just a cheerleader in a bikini showing what round it is. It is mildly easily. There is no swearing at all. It is only violent.
This game is not really that violent, practically speaking. The game is more of a simulation. You can plaster your body with whatever kind of tattoo logo you want. The only really other thing is that the ads for energy drinks that occur frequently.
This game is a fun one but there are some things you should look out for. There are ads and sponsorships along with the fighters using some bad words. Also ring girls wearing little clothing walk around the ring in between rounds. Another thing is there is violence with the fighters kneeing, punching, and kicking each other. Overall it is a fun game but may not be appropriate for younger kids.