I've only used it once though and after I did my PC was a complete mess in the game after that and I couldn't arrange anything at all no matter how much I tried..For me the only positive I can think of about it is you can put Pokemon that don't have HM's in it..and battle with them....online and such(and for the Battle Maison too I guess but I never go there anyway..)..for me it wasn't the most positive experience anyway and I probably wouldn't use it again..