Well I looked up the chances, and there's only a 20% chance that a pokemon will appear and there are at least 4 pokemon at every Grotto. That equates to a ~5% chance of finding what you're looking for, like Riolu. Then again, every 256 steps there's only a 5% chance that the Grotto regenerates so the process is much slower than a regular random encounter.Originally Posted by Dragoniteftw
So yes, you're probably right. No DW abilities bar Mincinno. I also think that N's previously released Darmanitan has Zen Mode, but Zen Mode sucks so it doesn't matter much.