[Honestly, it would still be out of the ordinary even in Szayel's world- one where going to other worlds and having magical costumes is a thing. He chooses to simply let that go, though.]

I suppose without enough information, it is difficult to tell either way. They were annoyingly vague in their task description- on purpose, most likely.

[He thinks about it a little more...]

Now you are genuinely making me curious.