Re: Bonus Items
It's an interesting idea, but I'm not so sure. For a start, I've never seen a battle (other than an Elite battle) which allowed the use of items. Also as Neo and Firestorm pointed out, 50% is way too high for an item attack boost.
Even if hold items were allowed, would it really be fair to only give them to the winners of tournaments? That would mean that only a very small number of people could benefit. Plus looking back on previous attempts at starting tournaments, they haven't exactly gone very well.
"Remember, battles may be won or lost but if the battlers do not learn, the battle served no purpose."