This can be done during the tutorial with Sora
. The tutorial makes you pick up a crate using
, from here you can just toss it at the Shadow
that appears in front of you.
If you missed , that's fine, there are several other objects within every single room in the game. They are the barrels and the crates with the stars on them.
Once you make contact with an enemy from an item you've thrown, the trophy Ace Striker