Buddy candy four times as fast. Would be nice if hatchies gave the same, but the release omits any such mention. Darnit.
Regardless, I feel so some field trips to Bane in our future.
So, I presume rock types will be more prevalent in eggs, too, but who knows. All I know is that I plan on doing a whole lot of walking to power up a Blissey. That’s been very slow going so far, especially as I got to the 8-candy-per-power-up stage. I never seem to get a good IV Rhydon, either, so maybe I’ll get lucky this event.
Pro tip from Silph Road: If you can manage it, get your buddy to 4.9 out of 5 km just before the event starts. Then when the event starts and the distance switches to 1.25 km, you’ll instantly be rewarded with 3 candies and be at 1.15/1.25 on your way to the fourth candy.