Sure! In this case, you're right that it'd be a loose interpretation and a limited version of his powers — the same way that listening to someone describe a location isn't the same level of "knowing" as actually visiting it yourself. He can certainly have a Keyblade and some limited elemental magic (though note, if he's manifesting both at the same time, that's going to be a dual drain on his batteries), but it'll be a toned-down and possibly less extensive version of what he's ultimately capable of in canon. How does that sound?