Wonder Woman maid

John worked his wishing magic and soon...

"Mazter Doe!" Wonder Woman said in a French accent. "Vy am I in ze clozet?"

"You were cleaning it, obviously," John said.

"Oh, of courze," she stepped out of the closet and began to clean as the maid she now was.

Since the closet worked well, John summoned the second member of his harem, this one a supervillain.