I'm hoping for Water/Dark, I think it fits the rogue/thief idea much better c: --- Official Scrafty Of The Black And White Clan. Official Lorelei of the BW 2 Boards. Official Beheeyem of the X/Y Boards.
I could also see it being a water/poison (poisonous frog kinda thing)
Dark seems more likely because i can see them doing a water/Dark, fire/psychic, and grass/fighting for the starters to reverse the weaknesses
I'm confused as to how that would reverse the weakness when Fire/Psychic would pretty much be at 4 X disadvantage against Water/Dark and in reverse Grass/Fighting would be at a 4X disadvantage to Fire/Psychic.
On topic: I prefer Water/Fighting.
Ninja esque rogue for the win. --- Only insecure and ignorant people try to debase someone online based on their username.