Ummm, it's pretty much Street Fighter IV for the mobile devices with random in-app purchases. Knowing Nexon, this might be some crazy pay-to-win stuff then again you will never know until you try! Google Play Store users are currently giving it a 4 star. It looks like the game uses a card system, random skill, multiplayer, real-time friend battle, PvP, ranking, and more. Honestly, I am not really interested in this version since I already own the newer console versions. I added it to my list because random followers often kept asking me about the status update of this game.
Google Play: Link