How to allow to use X ITEMS 2/3/6?

[Jacusiek]

I mean how to use X Attack 6, X Attack 3, X Special 3, Dire Hit 3, etc. during normal battle which isn't battle in Wonder Launcher? Because i cheated those items so I have them in my bag but when I want to use them in battle there aren't any of them, like they are "invisibile". Why is that happening? Normal X Items without any number after (X Attack, X Defend) I can use without any problems. Can someone help me, please?

@Edit: I forgot to say that I have pokemon White U/E version

[Andibad]

is just on wonder launcher battle mode only. If you on WLBM you can't use normal item.

[Jacusiek]

And how to launch WLBM?