>>13774364>>13774390A Dark Knight was what I immediately thought too, and yeah it does seem a bit out there to assume at this point, but who knows?
Chespin doesn't have anything pointing towards anything type wise, with only a slide bias towards Ground with it's moves (though they are things that can be reasoned with it's design). The other two are fairly obvious, but this one's a tricky one.
We do have to consider that Gamefreak doesn't seem to always base their concepts off of their types, and vice versa. Samurott wasn't a Fighting type, and Jellicent wasn't designed as a Ghost originally.