The items that raise your stats.
I say no because they can't be used in WIFI battles and in game, they wouldn't be used because there are stat raising moves which can be used instead of those items. Use it if you don't have stat raising moves or don't want to waste a move space, but I still think its not worth it.
X items are useful if you want to raise stats in a battle,but you don't want to waste a move slot for a stat riasing move,therefore you'll have 4 attacking moves and you can raise your stats,which is pretty useful.
I think that they have special uses.
I personally don't ever use them, but they could be used for capturing a legendary or something.
Like you can spam X Defend to raise defense so that you can stand attacks.
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