you have to beat him on rock, paper and scissors - save the game first because I think it is random
I did do that, at least thrice, and I lost every time so I wondered if there was something that I had to do so I could beat him XD
So I just have to repeat until I beat him? Okay I'll go and do it again XD Thank you for answering my question~ XD
Btw, how many times did you do before you were able to beat him?