In all games, Whitney is a small young girl with pink hair and pale skin, and it can be assumed by her size and development that Whitney is in her young child ages to her mid-teens.
Gold/Silver[]
Whitney wears a white and red t-shirt, as well as very short white shorts, ending at the top of her thighs. She also wears red sneakers and black socks.
HG/SS[]
Whitney's appearance slightly differs from Gold and Silver, her shorts are now blue, her socks are now striped, and she wears a red bracelet on her arm.
It is also revealed in some of her artwork that Whitney opens her shirt when playing sports. Because of this, she wears a blue sports bra, revealing her belly.
In the games[]
When defeated, Whitney will start crying and will not give the Gym Badge. If the player walks away, a trainer will tell you to talk to her. After Whitney stops crying, she will give the Plain Badge and TM45 (Attract).
In the Anime[]
Whitney first appears in the episodes "A Goldenrod Opportunity", "A Dairy Tale Ending", and "Bagged then Tagged". At first glance Whitney is a kind girl, but she can be klutzy and ditzy sometimes, getting lost in her own town as an example. However, in battle she is quite formidable, especially with her Miltank.
According to a few in-game NPCs, Whitney only recently started training Pokémon and was so talented she was given the position of Gym Leader by the Pokémon League, despite her inexperince as a Trainer and slight immaturity (such as leaving the Gym to go to the Radio station to win a Radio Card and crying after she loses).
Whitney's name may come from the word WHITE, since it is the absence of all color. This is because she is a Normal-Type trainer.
She is the first Gym Leader to primarily use Normal-type Pokémon (the second being Gym Leader Norman, the third being Gym Leader Lenora, and the fourth being Cheren in Black and White 2).
In the anime she has one Pokémon that isn't a Normal-type, a Nidorina, which is a Poison-type.
Like Maylene, she is the third Gym Leader of her region, has pink hair and eyes, and is from a city with a Game Corner and Department Store.
In "A Dairy Tale Ending", Whitney took her loss to Ash pretty well, compared to her crying after she lost in the games.
Being a different Pokémon would be understandeble, as if she were to use the same Pokémon than she would be a very difficult third Gym Leader.
All of Whitney's Pokémon in the main series and anime are female.
Clefairy is Whitney's only Pokémon in the anime that isn't always a female.
Whitney and Morty are, probably, the only two Johto Gym Leaders who did not appear in their Generation IV looks when "Bagged then Tagged" aired.
Whitney's Miltank has become infamous amongst fans of the game series due to how frustrating it can be to fight. However, it is much easier if a Fighting-type is used.