Thanks glad you like the game! It is not possible to remove the AI in tournament mode, but you can do it in custom mode, why would you want to do it in tournament mode?
I was playing with two other people and the AI would sometimes finish earlier that us taking away all the fun. Since I wanted to unlock new maps and have fun while doing it I just added a 4th player and left it standing there.
No problem, thanks for replying. I also have one more thing to mention. I sent you a message over on Twitter because I noticed a typo in the speech bubble that appears before selecting the tutorial 2. More precisely it's written "After that you'll can fight(...)".
