Loyal Defender

I'm hoping in KH III, they'll have Oakey Oaks as its own world.
Imagine getting to fight giant, terrifying, object-dematerializing aliens. So badass!
I know they had Chicken Little in KH II as a Summon.
But think of it like this - KH I had Mushu and Simba as summons, and in KH II their worlds were introduced.
In KH II, Chicken Little is one of the summons. So in KH III, chances are he'll have his own world.

You'd get a Keyblade called the, uh....uhm....

Homerun Hatcher?

Ballcracker? 

Something. It'd have the design of a baseball bat, with little fragmented eggshell pieces on the tip as the teeth of the Keyblade.