Lock up/ Chatter Locking with Unown G

[PikaTheXIII]

Say my Spiritomb had an Unown G attached to it, would it block the effect of it not being able to retreat during my turn? I'm pretty sure I know the answer, I just want ot make sure before Regionals this weekend.

 

[PokePop]

Sure that's what Unown G does.