Hey,I saw one of these in FFX111 and i thought it was cool.Here's what you do:
I start a story (a make-up one) and you add on to it.All of it has to be about FFX-2 though.With the exeption of Tidus.
Sound cool?
Here we go:

*Yuna walkes in a room*
Yuna-So Wakka,have you decided what to name your kid?
*Lulu walks in*
Lulu-No, not yet.Although he did think of Spencer.
*Lulu makes a face*
Wakka-I thought you loved that name !

There you go.Have fun.