[quote=@Dark Cloud]
[@Lugubrious] Would it be game-breaking if Ravio's main power allowed him to give his items to other characters for a short period? I was thinking he would only be able to give the items he rented to Link at first like the Rental Hammer, Ice Rod and Fire Rod?
[/quote]

So in essence, your plan for him is for him to act as a sort of unique support character who supplies allies with items? Conjuring items and pickups from his 'stock' to lend to other characters would be fine. And naturally, he can wield them himself due to Hyrule Warriors. I don't see this as game-breaking since he'd need this ability to be competitive with other characters, who would probably prefer their own weapons if it was inconvenient. He could also stockpile items and other equipment for the team so that other characters don't need to carry all their other stuff on them.