Not really Mew. The game has it so that Zorua turns into the last party member of your squad :O.

The reason I added that stipulation earlier is if you happen to use Zorua last....you wouldn't have anyone to change into, which is why the Opponent thing seemed more valid at the time. However, even with your battle with Jeli earlier on, you wee confused as to what was going on when you saw he didn't have a 'tomb.

Now, with this new way, players wont be stuck with having to use Zorua/ark in any place but last-and it keeps the element of surprise, which is what illusion really needs to be about. There's no surprise if you look it up and know.