Dunno. Can't check at the moment, sorta chaining for Gloom.
Yeah, I get to chains of 20 and now get shinies at all. it's a .05% chance of getting one at a chain of 3, so I was REALLY lucky.
Found a random encounter shiny on this game as well! =D LOL, while I was chaining for the exact same species, found it in a non-shiny patch >D