Artwork from X & Y
Waitress is a Trainer Class that was introduced in Generation IV. They are young women wearing a waitress's uniform. There is only one in Pokémon Diamond and Pearl, but there are more in the Battle Frontier of Pokémon Platinum. Their male counterpart is a Waiter.
|DPPt/HGSS Battle Sprite||
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In Pokémon Platinum's Battle Frontier, the Waitress of Diamond and Pearl is a Maid instead.