Both of them are gone now... I dunno if Yuna was ever here, but I'm sure Rikku's Pokemon still see her in her heart, and their dreams.
[...]
Elle kind of eats those dreams, though. Wonder if they remember them?

Lots of pictures, huh? Well, as long as you make sure the poor thing isn't gonna get spooked by them, I'm sure the two of them'll be fine with it.