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The female character seen in some promotional artwork for the original games has no official name. She's simply an unnamed character used when the promos called for a third trainer. I do not believe she was actually going to be in the games.
The PokeSpe character's design was originally based on this girl, but with some changes: blue eye color and belt clamp. Most image listings lump the PokeSpe and concept characters together. They both look very similar from a general viewpoint, so it's a common mistake.
In any instance, she's pretty cute. I like her gloves.