well that happend With the pokemon Sun and Moon LeakReviewers are always restricted in what they can and can't do with the things they receive. If they break the embargo, Nintendo terminates their contract and will no longer be able to receive any more review copies. But wouldn't it be nice if someone could actually break the embargo secretly and leak the ROM or ISO? I'm sure it will happen one day in the future. ^^
Speaking of review copies, there's no Wii U version of Breath of the Wild sent to reviewers.