That might be bad phrasing. I should reverse the order because it's intended to mean the whole opponent or parts of the arena. The way it's worded could lead people to believe it can move parts of the opponent.
A possible explanation is that Baltoy had to search before using Confusion, though given it's Ground and Psychic and the battle is basically underground, I wouldn't have reffed it in that order. As far as Confusion it can't really be used to bind body parts like you wanted to, though.