User blog comment:Hoohah/Piggie and Rare Drops/@comment-2173011-20100806001605

I think the only way to prove one way or another is with a case study. A suitably large sample of quest runs performed with and without petting the pig should yield suitably definitive results. If you want to prove this, then you're going to need a lot of fellow players to submit their findings.

For what its worth, I've pet the piggy, got an Ultra Lucky Cat from the canteen, subsequently hunted Gigginox, broke both his face and chest, and still didn't get a Fearsome Maw to drop. I've found that there's NOTHING guaranteed when it comes to this game.

@Wil Beasty, no, you have to press the "A" button, whether you're using Nunchuk or CC scheme.