Summon: TRANSFORM!

No, I'm not talking about Shiva turning into a motorcycle in XIII. I know this thread would belong there. I'm not stupid. Well, I am but not about that.

How many of you have ever imagined playing an FF where you could combine any of the main characters with one of those badass summons? I don't mean the lame Junction thing either. What if in combining them, you actually changed their image?

Who would you want to see as a summon? Who would you want to see combined with a summon? What summon would you like to see as a main character?

Then again, referring back to XIII, what summon would you like to see Transform and into what? What other tranformers would make good summons?