You can't play to the young inazuma11 (with mark's grandpa) but to the old.
Go to the shopping area and walk to the end, then you go into the mall walk straight on
and then to the road at the right.
You then come to the "secret warehouse" you must go in there and then you go to he right
goal.
There is a guy that calls "island" when you talk to him he asks if you want to play to the
old inazuma11.
Say yes and then the playing begins...!! Xd