>>28958073Greninja already had absurd stats from a 30% boost from its item and a 50% boost from its ability on all its moves though
You'd have to have enough of a stat increase to not only compensate for that, but also be better than it because the transformation leaves you with no ability and your item isn't nearly as effective as it would be on a protean set.
If you wanted a lategame sweeper there are a ton of better Pokemon for that job.
