A couple of my favorites:

Paine: Come get some!
Yuna: Paine gets all the good lines...

Rikku: Canwerestyet?Canwerestyet?Canwerestyet?
Paine: Shut up.

Rikku: I'm gonna kick you in the spleen!
Paine: ...spleen?

Rikku: We are deep pickles...