http://www.smogon.com/forums/showpost.php?p=4581257&postcount=11359
I fixed Foul Play (was just a typo, the UC was spent correctly) and Colosshale's accuracy and SpD.
Regarding Sketch, from DAT, op:
"If Smeargle has at least one instance of the move Sketch in its movepool, it can use Sketch in-battle to permanently replace one instance of Sketch with the last move performed by the target Pokemon."
"Smeargle may also spend 2 MC to Sketch any move known by its trainer's other Pokemon. Smeargle must have at least one instance of Sketch in its movepool to do so, and that instance of Sketch is permanently replaced by the chosen move."
"Necturine/Necturna"
Sketch is an Egg move for this CAP line, but staying true to concept, they can only get Sketch ONCE. Like Smeargle, they can Sketch a move known by one of the trainer's other Pokemon for 2 MC, however if they relearn Sketch, they must forfeit the Sketched move".
The way I see it, you can use sketch in battle to get any move, or you can spend 2MC to sketch any move you already have outside a battle. Or else the second paragraph wouldn't make any sense (why would I have to pay 2MC for a move I have and not for other moves?).