You could breed it directly from Sableye to Conkeldurr, but you can't breed move tutor moves in generation 1-5. And in Reborn we have Generation 5's mechanics.So no knock off
If I wanted one, I would pick Ralf, because his or her speed is very high and the special attack is high average. Speed is important for an abra as you do not want to have a slow one since there are Gengars and Galvantulas. I reccomend Ralf fren.
Wow. Purple shard. what a letdown. Then again, it is accesable really early in the game right? So of course it isn't so valuable
EDIT:
How are we supposed to get THAT one?
There is a hidden item near the Blacksteam factory and I know it could be valuable. I think to get there you need to get through that pitch-black puzzle inside. Has anyone completed it? ( This is the item by the door)